Dear "Configuration Mania" users,

As mentioned at issue#254 on bitbucket, "Configuration Mania" never work on Firefox 57 or later. This means that it gets impossible to check the config using "Configuration Mania" on Firefox 57 or later.

I have created a list of config that "Configuration Mania" has provided so far. It is able to be referred on Firefox 57 or later.

Tip: It is possible to copy easily the preference name from the right-click context menu (on Firefox).

  • browser.urlbar.clickSelectsAll
    bool
    Browser Location Bar
    Select all contents when clicked
    • true ☑
    • false ☐
  • browser.urlbar.doubleClickSelectsAll
    bool
    Browser Location Bar
    Select all contents when double-clicked
    • true ☑
    • false ☐
  • browser.urlbar.autocomplete.enabled
    bool
    Browser Location Bar
    Disable the autocomplete
    • true ☐
    • false ☑
  • browser.urlbar.autoFill
    bool
    Browser Location Bar
    Autocomplete best match as you type
    • true ☑
    • false ☐
  • browser.urlbar.filter.javascript
    bool
    Browser Location Bar
    Filter out bookmarklet ("javascript:" URLs)
    • true ☑
    • false ☐
  • browser.urlbar.maxRichResults
    int
    Browser Location Bar
    Maximum number of entries
    • 0 to +∞
  • browser.urlbar.delay
    int
    Browser Location Bar
    Wait time on the autocomplete :
    • 0 to +∞
  • browser.urlbar.formatting.enabled
    bool
    Browser Location Bar Formatting
    Enable domain highlighting.
    • true ☑
    • false ☐
  • browser.urlbar.trimURLs
    bool
    Browser Location Bar Formatting
    Drop http:// prefix.
    • true ☑
    • false ☐
  • keyword.enabled
    bool
    Browser Location Bar Unknown Locations
    Perform a web search when entered text is not a web location
    • true ☑
    • false ☐
  • browser.fixup.alternate.enabled
    bool
    Browser Location Bar Unknown Locations Domain Guessing
    Automatically add prefix & suffix to the location if a web page isn't found.
    • true ☑
    • false ☐
  • browser.fixup.alternate.prefix
    string
    Browser Location Bar Unknown Locations Domain Guessing
    Prefix :
  • browser.fixup.alternate.suffix
    string
    Browser Location Bar Unknown Locations Domain Guessing
    Suffix :
  • permissions.default.image
    int
    Browser Page control Image
    Load images automatically
    • 1 true
    • 2 false
  • image.animation_mode
    string
    Browser Page control Image Animated images should loop
    Animated images should loop
    • normal As many times as the image specifies
    • once Once
    • none Never (Stop)
  • dom.image.srcset.enabled
    bool
    Browser Page control Image Multiple Source Image
    Disable srcset attribute on img elements
    • true ☐
    • false ☑
  • dom.image.picture.enabled
    bool
    Browser Page control Image Multiple Source Image
    Disable picture element
    • true ☐
    • false ☑
  • browser.enable_automatic_image_resizing
    bool
    Browser Page control Image
    Resize large images to fit in the browser window
    • true ☑
    • false ☐
  • browser.display.show_image_placeholders
    bool
    Browser Page control Image
    Show image placeholders while image is loading or when image is broken
    • true ☑
    • false ☐
  • browser.display.force_inline_alttext
    bool
    Browser Page control Image
    Force broken-image ALT text to be displayed inline
    • true ☑
    • false ☐
  • gfx.color_management.mode
    int
    Browser Page control Color Management (CMS) (takes effect after restart)
    Enable for tagged graphics only
    • 0 Disable CMS
    • 1 Enable for rendered graphics
    • 2 Enable for tagged graphics only
  • plugins.click_to_play
    bool
    Browser Page control Plugins
    Do not load the plugin content until you click on it
    • true ☑
    • false ☐
  • dom.ipc.plugins.flash.disable-protected-mode
    bool
    Browser Page control Plugins
    Disable protected mode in Flash Player 11.3+ (Windows)
    • true ☑
    • false ☐
  • layout.xml.prettyprint
    bool
    Browser Page control
    View unstyled XML in plain style
    • true ☐
    • false ☑
  • browser.zoom.siteSpecific
    bool
    Browser Page control
    Remember the zoom preferences page by page
    • true ☑
    • false ☐
  • gfx.downloadable_fonts.enabled
    bool
    Browser Page control
    Download CSS3 Web fonts
    • true ☑
    • false ☐
  • layout.css.vertical-text.enabled
    bool
    Browser Page control
    Disable CSS vertical text
    • true ☐
    • false ☑
  • layout.css.prefixes.webkit
    bool
    Browser Page control
    Enable some "-webkit-" vendor-prefixed CSS properties
    • true ☑
    • false ☐
  • layout.css.visited_links_enabled
    bool
    Browser Page control
    Disable CSS visited-link styling to protect the privacy of browsing history
    • true ☐
    • false ☑
  • browser.display.use_focus_colors
    bool
    Browser Page control Highlight Focus
    Highlight focused objects with color
    • true ☑
    • false ☐
  • browser.display.focus_background_color
    string
    Browser Page control Highlight Focus
    Background Color
    • #RRGGBB
  • browser.display.focus_text_color
    string
    Browser Page control Highlight Focus
    Text Color
    • #RRGGBB
  • gfx.use_text_smoothing_setting
    bool
    Browser Page control
    Always use text smoothing (takes effect only Mac)
    • true ☐
    • false ☑
  • layers.acceleration.disabled
    bool
    Browser Page control Hardware acceleration
    Disable acceleration for all widgets
    • true ☑
    • false ☐
  • layers.acceleration.force-enabled
    bool
    Browser Page control Hardware acceleration
    Force acceleration on, ignoring blacklists
    • true ☑
    • false ☐
  • gfx.direct2d.disabled
    bool
    Browser Page control Hardware acceleration
    Disable the automatic detection and use of direct2d (Windows)
    • true ☑
    • false ☐
  • gfx.direct2d.force-enabled
    bool
    Browser Page control Hardware acceleration
    Enable Direct2D regardless of automatic detection or blacklisting (Windows)
    • true ☑
    • false ☐
  • layers.offmainthreadcomposition.enabled
    bool
    Browser Page control Hardware acceleration
    Enable Off Main Thread Compositing (OMTC)
    • true ☑
    • false ☐
  • browser.newtabpage.enabled
    bool
    Browser TabBrowsing New Tab
    Enable about:newtab
    • true ☑
    • false ☐
  • browser.newtabpage.rows
    int
    Browser TabBrowsing New Tab
    Number of rows of newtab grid
    • 1 to +∞
  • browser.newtabpage.columns
    int
    Browser TabBrowsing New Tab
    Number of columns of newtab grid
    • 1 to +∞
  • browser.pagethumbnails.capturing_disabled
    bool
    Browser TabBrowsing New Tab
    Disable capturing thumbnails for newly visited pages
    • true ☑
    • false ☐
  • browser.tabs.showAudioPlayingIcon
    bool
    Browser TabBrowsing
    Show mute icons on tabs that playing audio
    • true ☑
    • false ☐
  • browser.tabs.closeWindowWithLastTab
    bool
    Browser TabBrowsing
    Close the window when closing its last tab
    • true ☑
    • false ☐
  • browser.search.openintab
    bool
    Browser TabBrowsing
    Open the results in a new tab when searching from search bar with ENTER key
    • true ☑
    • false ☐
  • browser.tabs.insertRelatedAfterCurrent
    bool
    Browser TabBrowsing
    Open new tab just after the current tab
    • true ☑
    • false ☐
  • browser.tabs.warnOnCloseOtherTabs
    bool
    Browser TabBrowsing
    Warn me when closing other multiple tabs
    • true ☑
    • false ☐
  • browser.tabs.loadBookmarksInBackground
    bool
    Browser TabBrowsing Auto tab selection
    Select New Tabs from Bookmarks or History
    • true ☐
    • false ☑
  • browser.tabs.loadDivertedInBackground
    bool
    Browser TabBrowsing Auto tab selection
    When a new tab opened by links or external applications, switch to it immediately
    • true ☐
    • false ☑
  • browser.tabs.selectOwnerOnClose
    bool
    Browser TabBrowsing Auto tab selection
    When closing a tab, Focus back to the tab that opened it
    • true ☑
    • false ☐
  • browser.ctrlTab.previews
    bool
    Browser TabBrowsing Enable thumbnail preview
    on Ctrl+TAB
    • true ☑
    • false ☐
  • browser.taskbar.previews.enable
    bool
    Browser TabBrowsing Enable thumbnail preview
    on Taskbar (Windows7)
    • true ☑
    • false ☐
  • browser.tabs.animate
    bool
    Browser TabBrowsing Animation
    Opening/Closing tab
    • true ☑
    • false ☐
  • browser.sessionstore.interval
    int
    Browser Session Store
    Save sessions at intervals of
    • 1 to +∞
  • browser.sessionstore.max_windows_undo
    int
    Browser Session Store Number of Recently Closed Tabs/Windows which is remembered
    Number of closed windows:
    • 0 to +∞
  • browser.sessionstore.max_tabs_undo
    int
    Browser Session Store Number of Recently Closed Tabs/Windows which is remembered
    Number of closed tabs:
    • 0 to +∞
  • browser.sessionstore.restore_on_demand
    bool
    Browser Session Store Restore on demand
    Don't load tabs until selected
    • true ☑
    • false ☐
  • browser.sessionstore.restore_hidden_tabs
    bool
    Browser Session Store Restore on demand
    Don't load tabs in other hidden tab groups until selected
    • true ☑
    • false ☐
  • browser.sessionstore.restore_pinned_tabs_on_demand
    bool
    Browser Session Store Restore on demand
    Don't load pinned tabs until selected
    • true ☑
    • false ☐
  • browser.sessionstore.resume_from_crash
    bool
    Browser Session Store
    Restore the previous session when Firefox starts after a crash
    • true ☑
    • false ☐
  • browser.warnOnQuit
    bool
    Browser Session Store
    Ask if Firefox save the session on quit/restart or not
    • true ☑
    • false ☐
  • browser.showQuitWarning
    bool
    Browser Session Store
    Never ask on quit
    • true ☐
    • false ☑
  • browser.warnOnRestart
    bool
    Browser Session Store
    Never ask on restart
    • true ☐
    • false ☑
  • browser.sessionstore.privacy_level
    int
    Browser Session Store Store extra session data :
    Store extra session data :
    • 0 for any site
    • 1 for non-secure (non-HTTPS) sites only
    • 2 Never
  • browser.chrome.site_icons
    bool
    Browser Bookmark Icons (Favicons)
    Show bookmark icons on the tab
    • true ☑
    • false ☐
  • browser.chrome.favicons
    bool
    Browser Bookmark Icons (Favicons)
    Show bookmark icons on bookmark elements
    • true ☑
    • false ☐
  • media.wmf.enabled
    bool
    Browser Multimedia
    Enable Windows Media Foundation (Windows7+)
    • true ☑
    • false ☐
  • media.windows-media-foundation.play-stand-alone
    bool
    Browser Multimedia
    Play stand-alone
    • true ☑
    • false ☐
  • media.directshow.enabled
    bool
    Browser Multimedia
    Enable Direct Show (Windows)
    • true ☑
    • false ☐
  • media.ffvpx.enabled
    bool
    Browser Multimedia
    Enable built-in FFVPX
    • true ☑
    • false ☐
  • media.apple.mp3.enabled
    bool
    Browser Multimedia
    Enable Apple MP3 (Mac)
    • true ☑
    • false ☐
  • media.apple.mp4.enabled
    bool
    Browser Multimedia
    Enable Apple MP4 (Mac)
    • true ☑
    • false ☐
  • media.mediasource.enabled
    bool
    Browser Multimedia
    Enable Media Source Extensions
    • true ☑
    • false ☐
  • media.mediasource.mp4.enabled
    bool
    Browser Multimedia Supported Formats
    mp4
    • true ☑
    • false ☐
  • media.mediasource.webm.enabled
    bool
    Browser Multimedia Supported Formats
    webm
    • true ☑
    • false ☐
  • geo.enabled
    bool
    Browser Web API
    Enable Geolocation
    • true ☑
    • false ☐
  • geo.wifi.uri
    string
    Browser Web API
    Geolocation service URL:
  • full-screen-api.enabled
    bool
    Browser Web API
    Enable Full Screen API
    • true ☑
    • false ☐
  • dom.battery.enabled
    bool
    Browser Web API
    Enable Battery Status API
    • true ☑
    • false ☐
  • dom.sms.enabled
    bool
    Browser Web API
    Enable Messaging (SMS) API
    • true ☑
    • false ☐
  • dom.vibrator.enabled
    bool
    Browser Web API
    Enable Vibration API
    • true ☑
    • false ☐
  • webgl.disabled
    bool
    Browser Web API
    Enable WebGL (takes effect after restart)
    • true ☐
    • false ☑
  • dom.serviceWorkers.enabled
    bool
    Browser Web API
    Enable Service Workers
    • true ☑
    • false ☐
  • dom.webcomponents.enabled
    bool
    Browser Web API
    Enable Web Components (Shadow DOM)
    • true ☑
    • false ☐
  • dom.webcomponents.customelements.enabled
    bool
    Browser Web API
    Enable custom elements
    • true ☑
    • false ☐
  • javascript.options.wasm
    bool
    Browser Web API
    Enable Web Assembly
    • true ☑
    • false ☐
  • browser.altClickSave
    bool
    Browser Download
    Disable ALT+Click and ALT+ENTER to download links
    • true ☐
    • false ☑
  • browser.download.manager.addToRecentDocs
    bool
    Browser Download
    Add new downloads to the recent documents list
    • true ☑
    • false ☐
  • browser.download.manager.quitBehavior
    int
    Browser Download When Firefox quited but downloads in progress:
    When Firefox quited but downloads in progress:
    • 0 Pause and Resume downloads automatically when Firefox restarted
    • 1 Pause but will not resume downloads automatically when Firefox restarted
    • 2 Cancel downloads on quit
  • browser.download.manager.showAlertOnComplete
    bool
    Browser Download
    Show alert when a download completes
    • true ☑
    • false ☐
  • browser.download.animateNotifications
    bool
    Browser Download
    Disable the animated notifications of the Download Indicator when a download starts or completes.
    • true ☐
    • false ☑
  • general.useragent.override
    wstring
    Browser User-Agent
    UA string :
  • nglayout.initialpaint.delay
    int
    Browser Paint&Rendering
    Initial paint delay
    • 0 to +∞
  • content.notify.backoffcount
    int
    Browser Paint&Rendering
    • -1 to +∞
  • content.notify.interval
    int
    Browser Paint&Rendering
    Minimum interval between reflows
    • 0 to +∞
  • content.interrupt.parsing
    bool
    Browser Paint&Rendering
    Parsing cannot be interrupt
    • true ☐
    • false ☑
  • content.max.tokenizing.time
    int
    Browser Paint&Rendering
    Maximum time to interrupt the process
    • 0 to +∞
  • content.switch.threshold
    int
    Browser Paint&Rendering
    Enter Low frequency mode after you have no activity on High frequency mode for
    • 0 to +∞
  • browser.cache.memory.enable
    bool
    Browser Browser Cache
    Enable cache memory (Never disabled, usually)
    • true ☑
    • false ☐
  • browser.cache.memory.capacity
    int
    Browser Browser Cache
    • -1 to +∞
  • browser.cache.check_doc_frequency
    int
    Browser Browser Cache Check cache of the pages ...
    Check cache of the pages ...
    • 0 Once per session
    • 3 When it is out of date (Preferred)
    • 1 Each time
    • 2 Never (Not Recommended)
  • config.trim_on_minimize
    bool
    Browser Browser Cache
    Swap out memory when Firefox is minimized (Windows Only)
    • true ☑
    • false ☐
  • browser.cache.disk_cache_ssl
    bool
    Browser Browser Cache
    Also store SSL-connection pages in the cache (INSECURE)
    • true ☑
    • false ☐
  • network.prefetch-next
    bool
    Browser Browser Cache
    Enable link prefetching
    • true ☑
    • false ☐
  • browser.sessionhistory.max_total_viewers
    int
    Browser Browser Cache Max Number of pages stored in memory
    • -1 to +∞
  • browser.cache.disk.parent_directory
    string
    Browser Browser Cache Cache Folder Location
    /tmp/75d4100e-da98-4483-8464-c82e3ccb4427
  • network.predictor.enabled
    bool
    Browser Other Network predictor
    Pre-connect link-target server on hovering mouse over the link
    • true ☑
    • false ☐
  • network.predictor.enable-hover-on-ssl
    bool
    Browser Other Network predictor
    Do not pre-connect on hovering mouse over the link in HTTPS site
    • true ☐
    • false ☑
  • network.http.speculative-parallel-limit
    int
    Browser Other Network predictor
    Max number of sockets allowable for a speculative connection:
    • 0 to +∞
  • network.dns.disableIPv6
    bool
    Browser Other DNS Setting
    Disable IPv6 DNS lookups
    • true ☑
    • false ☐
  • network.dns.disablePrefetch
    bool
    Browser Other DNS Setting
    Enable DNS prefetching to improve page load performance
    • true ☐
    • false ☑
  • prompts.tab_modal.enabled
    bool
    Browser Other
    Use tab modal dialog for alert()/prompt()/confirm()
    • true ☑
    • false ☐
  • browser.xul.error_pages.enabled
    bool
    Browser Other
    Display an error dialog when a page cannot be loaded
    • true ☐
    • false ☑
  • browser.bookmarks.showRecentlyBookmarked
    bool
    Browser Other
    Show Recently Bookmarked on the bookmark menu
    • true ☑
    • false ☐
  • view_source.editor.external
    bool
    Browser Other
    View source with external editor
    • true ☑
    • false ☐
  • view_source.editor.path
    string
    Browser Other
    Editor path:
  • view_source.tab
    bool
    Browser Other
    View source in a new tab
    • true ☑
    • false ☐
  • places.history.expiration.max_pages
    int
    Browser Other Max number of unique URLs to retain in history
    • -1 to +∞
  • general.warnOnAboutConfig
    bool
    Browser Other
    Show the warning message on about:config
    • true ☑
    • false ☐
  • loop.enabled
    bool
    Browser Other Firefox Hello
    Forget the guest access token
    • true ☑
    • false ☐
  • loop.hawk-session-token
    string
    Browser Other Firefox Hello
    Forget the guest access token
  • loop.key
    string
    Browser Other Firefox Hello
    Forget the guest access token
  • loop.ot.guid
    string
    Browser Other Firefox Hello
    Forget the guest access token
  • toolkit.cosmeticAnimations.enabled
    bool
    Browser Other
    Disable UI animations
    • true ☐
    • false ☑
  • javascript.enabled
    bool
    Security JavaScript
    Enable JavaScript
    • true ☑
    • false ☐
  • dom.max_script_run_time
    int
    Security JavaScript More Advanced
    The browser warns when a script is running over
    • 0 to +∞
  • dom.allow_scripts_to_close_windows
    bool
    Security JavaScript More Advanced
    Disable Closing non-popup windows
    • true ☐
    • false ☑
  • dom.disable_window_flip
    bool
    Security JavaScript More Advanced
    Disable Requesting/Removing window focus
    • true ☑
    • false ☐
  • dom.disable_window_move_resize
    bool
    Security JavaScript More Advanced
    Disable Moving/Resizing existing windows
    • true ☑
    • false ☐
  • dom.disable_window_status_change
    bool
    Security JavaScript More Advanced
    Disable Changing statusbar
    • true ☑
    • false ☐
  • dom.event.contextmenu.enabled
    bool
    Security JavaScript More Advanced
    Disallow to dispatch contextmenu events
    • true ☐
    • false ☑
  • dom.event.clipboardevents.enabled
    bool
    Security JavaScript More Advanced
    Disallow to dispatch clipboard events (copy/cut/paste)
    • true ☐
    • false ☑
  • nglayout.events.dispatchLeftClickOnly
    bool
    Security JavaScript More Advanced
    Allow to dispatch left click only
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.menubar
    bool
    Security JavaScript UI-Spoofing
    Menubar
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.resizable
    bool
    Security JavaScript UI-Spoofing
    Resizable
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.scrollbars
    bool
    Security JavaScript UI-Spoofing
    Scroll bars
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.toolbar
    bool
    Security JavaScript UI-Spoofing
    Tool bar
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.location
    bool
    Security JavaScript UI-Spoofing
    Location bar
    • true ☑
    • false ☐
  • dom.disable_window_open_feature.status
    bool
    Security JavaScript UI-Spoofing
    Status bar
    • true ☑
    • false ☐
  • privacy.popups.showBrowserMessage
    bool
    Security Popup Win.
    Display a notification bar at the top of the content area
    • true ☑
    • false ☐
  • browser.link.open_newwindow
    int
    Security Popup Win.
    On opening new window by clicking links that specify target attribute:
    • 1 Open new windows in the current tabs instead
    • 3 Open new windows in new tabs instead
    • 2 Open new windows
  • browser.link.open_newwindow.restriction
    int
    Security Popup Win.
    On opening new popup windows using JavaScript:
    • 0 Same as the link's setting
    • 1 Open new window
    • 2 Same as the link's setting, but open window if specified how to be displayed (Default)
  • dom.popup_maximum
    int
    Security Popup Win.
    Max number of popup windows
    • 0 to +∞
  • privacy.popups.disable_from_plugins
    int
    Security Popup Win.
    Restrictions on plugin-initiated popup windows:
    • 0 No restrictions
    • 1 Limit the numbers to "Max number of popup windows"
    • 2 Block all except whitelisted
    • 3 Block all even those on whitelisted
  • dom.popup_allowed_events
    string
    Security Popup Win.
    Allow to open when:
    • reset Reset form
    • submit Submit form
    • select Selected a form
    • change Changed a text
    • resize Resized windows
    • input Input
    • keypress Pressed Key
    • keydown Key Down
    • keyup Key Up
    • mouseup Mouse Up
    • mousedown Mouse Down
    • click Clicked
    • dblclick Double Clicked
    • touchstart Touch Start
    • touchend Touch End
    • notificationclick Notification Clicked
  • security.tls.version.min
    int
    Security SSL SSL Protocol Versions
    • 0 SSL 3.0
    • 1 TLS 1.0
    • 2 TLS 1.1
    • 3 TLS 1.2
    • 4 TLS 1.3
  • security.tls.version.max
    int
    Security SSL SSL Protocol Versions
    • 0 SSL 3.0
    • 1 TLS 1.0
    • 2 TLS 1.1
    • 3 TLS 1.2
    • 4 TLS 1.3
  • security.mixed_content.block_active_content
    bool
    Security SSL Mixed Content
    Don't load insecure content on encrypted pages
    • true ☑
    • false ☐
  • security.mixed_content.block_display_content
    bool
    Security SSL Mixed Content
    Don't load other types of mixed content on encrypted pages
    • true ☑
    • false ☐
  • browser.ssl_override_behavior
    int
    Security SSL
    "Add Security Exception" dialog behavior when secure connection failed
    • 0 Do Not pre-populate the current URL as an exception and Do Not pre-fetch the SSL certificate.
    • 1 Pre-populate the current URL but Do Not pre-fetch the certificate.
    • 2 Pre-populate the current URL and pre-fetch the certificate.
  • network.http.redirection-limit
    int
    Security Network
    Max number of HTTP redirections to follow:
    • 0 to +∞
  • network.IDN_show_punycode
    bool
    Security Network
    Show IDN in punycode
    • true ☑
    • false ☐
  • signon.autofillForms
    bool
    Security Privacy Form
    Automatically fill sign-in forms
    • true ☑
    • false ☐
  • network.cookie.lifetime.days
    int
    Security Privacy History Cookie
    Accept cookies for
    • 0 to +∞
  • dom.storage.enabled
    bool
    Security Privacy DOM Storage
    Enable DOM Storage
    • true ☑
    • false ☐
  • privacy.trackingprotection.enabled
    bool
    Security Privacy Tracking Protection
    Enable Tracking Protection
    • true ☑
    • false ☐
  • privacy.trackingprotection.pbmode.enabled
    bool
    Security Privacy Tracking Protection
    Enable Tracking Protection for Private Browsing
    • true ☑
    • false ☐
  • privacy.userContext.enabled
    bool
    Security Privacy Contextual Identities
    Enable Container Tab
    • true ☑
    • false ☐
  • signon.expireMasterPassword
    bool
    Security Privacy Master Password Master Password Timeout
    • true ☑
    • false ☐
  • security.ask_for_password
    int
    Security Privacy Master Password Master Password Timeout
    Master Password Timeout
    • 0 The first time it is needed
    • -1 Every time it is needed
    • 1 If it has not been used for
  • security.password_lifetime
    int
    Security Privacy Master Password Master Password Timeout
    • 0 to +∞
  • network.http.sendRefererHeader
    int
    Security Referrer
    • 0 Never Send (Not recommended)
    • 1 Send only on clicks
    • 2 Send on image requests as well
  • network.http.referer.spoofSource
    bool
    Security Referrer
    Spoof Referrer URL and use the target URL as the referrer
    • true ☑
    • false ☐
  • network.http.referer.trimmingPolicy
    int
    Security Referrer
    Referrer URL trimming policy
    • 0 Full URL
    • 1 scheme+host+port+path
    • 2 scheme+host+port
  • network.http.referer.XOriginPolicy
    int
    Security Referrer
    Cross origin policy
    • 0 Always send Referrer header
    • 1 Only send if base domains match
    • 2 Only send if hosts match
  • network.http.referer.userControlPolicy
    int
    Security Referrer Default Referrer-Policy Default Referrer-Policy
    Default Referrer-Policy
    • 0 no-referrer
    • 1 same-origin
    • 2 strict-origin-when-cross-origin
    • 3 no-referrer-when-downgrade
  • network.http.sendSecureXSiteReferrer
    bool
    Security Referrer Default Referrer-Policy
    Do not send the Referrer header when navigating from a https site to another https site
    • true ☐
    • false ☑
  • security.fileuri.strict_origin_policy
    bool
    Security Content Same origin policy for local documents
    Same origin policy for local documents
    • true ☑
    • false ☐
  • network.http.version
    string
    HTTP Network Connection Direct Connection Options
    Direct Connection Options
    • 1.0 Use HTTP 1.0
    • 1.1 Use HTTP 1.1
  • network.http.pipelining
    bool
    HTTP Network Connection Direct Connection Options
    Enable Pipelining
    • true ☑
    • false ☐
  • network.http.proxy.version
    string
    HTTP Network Connection Proxy Connection Options
    Proxy Connection Options
    • 1.0 Use HTTP 1.0
    • 1.1 Use HTTP 1.1
  • network.http.proxy.pipelining
    bool
    HTTP Network Connection Proxy Connection Options
    Enable Pipelining
    • true ☑
    • false ☐
  • network.http.pipelining.ssl
    bool
    HTTP Network Connection
    Enable Pipelining for HTTPS
    • true ☑
    • false ☐
  • network.http.spdy.enabled
    bool
    HTTP Network Connection
    Enable SPDY Protocol
    • true ☑
    • false ☐
  • network.http.pipelining.maxrequests
    int
    HTTP Network Max Connections
    Max Number of pipelining requests
    • 1 to +∞
  • network.http.max-connections
    int
    HTTP Network Max Connections
    Max Number of Connections (Total)
    • 1 to +∞
  • network.http.max-persistent-connections-per-server
    int
    HTTP Network Max Connections
    Max Number of Persistent Connections (per Server)
    • 1 to +∞
  • network.http.max-persistent-connections-per-proxy
    int
    HTTP Network Max Connections
    Max Number of Persistent Connections (via Proxy)
    • 1 to +∞
  • network.http.connection-retry-timeout
    int
    HTTP Network Timeout
    Connection retry
    • 0 to +∞
  • network.http.keep-alive.timeout
    int
    HTTP Network Timeout
    Keep-Alive
    • 0 to +∞
  • network.http.spdy.timeout
    int
    HTTP Network Timeout
    SPDY
    • 0 to +∞
  • network.http.accept-encoding
    string
    HTTP Network Header
    Accept-Encoding
  • network.http.accept-encoding.secure
    string
    HTTP Network Header
    Accept-Encoding (for HTTPS)
  • network.http.accept.default
    string
    HTTP Network Header
    Accept (for Content)
  • image.http.accept
    string
    HTTP Network Header
    Accept (for Image)
  • mousewheel.default.action
    int
    UI Mouse wheel Mouse wheel binding
    Scroll contents
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.default.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.default.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.default.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_alt.action
    int
    UI Mouse wheel Mouse wheel binding
    Scroll contents
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.with_alt.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_alt.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_alt.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_control.action
    int
    UI Mouse wheel Mouse wheel binding
    Zoom in or out the contents
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.with_control.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_control.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_control.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_meta.action
    int
    UI Mouse wheel Mouse wheel binding
    Scroll contents
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.with_meta.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_meta.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_meta.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_shift.action
    int
    UI Mouse wheel Mouse wheel binding
    Go back or forward in the history
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.with_shift.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_shift.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_shift.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_win.action
    int
    UI Mouse wheel Mouse wheel binding
    Scroll contents
    • 0 Do nothing
    • 1 Scroll contents
    • 2 Go back or forward in the history
    • 3 Zoom in or out the contents
  • mousewheel.with_win.delta_multiplier_x
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_win.delta_multiplier_y
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • mousewheel.with_win.delta_multiplier_z
    int
    UI Mouse wheel Mouse wheel binding
    • 0 to +∞
  • browser.gesture.pinch.in
    string
    UI Multi-Touch Multi-Touch Gestures
    Pinch-in
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.pinch.in.shift
    string
    UI Multi-Touch Multi-Touch Gestures
    Pinch-in with shift
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.pinch.out
    string
    UI Multi-Touch Multi-Touch Gestures
    Pinch-out
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.pinch.out.shift
    string
    UI Multi-Touch Multi-Touch Gestures
    Pinch-out with shift
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.swipe.up
    string
    UI Multi-Touch Multi-Touch Gestures Swipe (left/right/up/down)
    cmd_scrollTop
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.swipe.left
    string
    UI Multi-Touch Multi-Touch Gestures Swipe (left/right/up/down)
    Browser:BackOrBackDuplicate
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.swipe.right
    string
    UI Multi-Touch Multi-Touch Gestures Swipe (left/right/up/down)
    Browser:ForwardOrForwardDuplicate
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.swipe.down
    string
    UI Multi-Touch Multi-Touch Gestures Swipe (left/right/up/down)
    cmd_scrollBottom
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.twist.left
    string
    UI Multi-Touch Multi-Touch Gestures Twist (left-/right-handed)
    cmd_gestureRotateLeft
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • browser.gesture.twist.right
    string
    UI Multi-Touch Multi-Touch Gestures Twist (left-/right-handed)
    cmd_gestureRotateRight
    • Browser:AddBookmarkAs
    • Browser:Back
    • Browser:BackOrBackDuplicate
    • Browser:BookmarkAllTabs
    • Browser:Forward
    • Browser:ForwardOrForwardDuplicate
    • Browser:Home
    • Browser:NewUserContextTab
    • Browser:NextTab
    • Browser:OpenAboutContainers
    • Browser:OpenFile
    • Browser:OpenLocation
    • Browser:PrevTab
    • Browser:Reload
    • Browser:ReloadOrDuplicate
    • Browser:ReloadSkipCache
    • Browser:RestoreLastSession
    • Browser:SavePage
    • Browser:SendLink
    • Browser:ShowAllBookmarks
    • Browser:ShowAllHistory
    • Browser:ShowAllTabs
    • Browser:Stop
    • ConfMania:Open
    • History:UndoCloseTab
    • History:UndoCloseWindow
    • PageAction:copyURL
    • PageAction:emailLink
    • Social:Addons
    • Social:SharePage
    • Tools:Addons
    • Tools:Downloads
    • Tools:PrivateBrowsing
    • Tools:Sanitize
    • Tools:Search
    • View:FullScreen
    • View:PageInfo
    • View:PageSource
    • View:ReaderView
    • cmd_CustomizeToolbars
    • cmd_close
    • cmd_closeWindow
    • cmd_copy
    • cmd_cut
    • cmd_delete
    • cmd_find
    • cmd_findAgain
    • cmd_findPrevious
    • cmd_fullZoomEnlarge
    • cmd_fullZoomReduce
    • cmd_fullZoomReset
    • cmd_fullZoomToggle
    • cmd_gestureRotateEnd
    • cmd_gestureRotateLeft
    • cmd_gestureRotateRight
    • cmd_handleBackspace
    • cmd_handleShiftBackspace
    • cmd_newNavigator
    • cmd_newNavigatorTab
    • cmd_newNavigatorTabNoEvent
    • cmd_pageSetup
    • cmd_paste
    • cmd_print
    • cmd_printPreview
    • cmd_quitApplication
    • cmd_redo
    • cmd_selectAll
    • cmd_switchTextDirection
    • cmd_toggleMute
    • cmd_undo
    • placesCmd_copy
    • placesCmd_createBookmark
    • placesCmd_cut
    • placesCmd_delete
    • placesCmd_deleteDataHost
    • placesCmd_moveBookmarks
    • placesCmd_new:bookmark
    • placesCmd_new:folder
    • placesCmd_new:separator
    • placesCmd_open
    • placesCmd_open:privatewindow
    • placesCmd_open:tab
    • placesCmd_open:window
    • placesCmd_paste
    • placesCmd_reload
    • placesCmd_rename
    • placesCmd_show:info
    • placesCmd_sortBy:name
  • accessibility.typeaheadfind.prefillwithselection
    bool
    UI Find in page
    Set find term to selection text when find bar is opened and Ctrl-F is pressed.
    • true ☑
    • false ☐
  • accessibility.typeaheadfind.timeout
    int
    UI Find in page Quick Find (Find As You Type)
    Clear the current search after
    • 0 to +∞
  • accessibility.typeaheadfind.enablesound
    bool
    UI Find in page Quick Find (Find As You Type)
    Play a sound when typed text isn't found (takes effect after restart)
    • true ☑
    • false ☐
  • accessibility.typeaheadfind.casesensitive
    int
    UI Find in page Case sensitivity mode
    Case sensitivity mode
    • 0 Case-insensitive
    • 1 Case-sensitive
    • -1 Case-sensitive only if the search string contains upper-case characters but isn't all-caps
  • accessibility.tabfocus
    int
    UI Key Navigation Tab Focus Navigation
    Links
    • 4 Links
    • 2 Buttons, radio buttons, checkboxes, and lists
  • accessibility.browsewithcaret_shortcut.enabled
    bool
    UI Key Navigation Browse With Caret
    Use the F7 shortcut to toggle caret browsing
    • true ☑
    • false ☐
  • accessibility.warn_on_browsewithcaret
    bool
    UI Key Navigation Browse With Caret
    Warn me before turning on caret browsing
    • true ☑
    • false ☐
  • ui.key.accelKey
    int
    UI Key Navigation Keyboard accelerators
    Accelerator key:
    • 0 to +∞
  • ui.key.menuAccessKey
    int
    UI Key Navigation Keyboard accelerators
    Menu access key:
    • 0 to +∞
  • browser.backspace_action
    int
    UI Key Navigation Action when Pressing [Backspace] :
    Action when Pressing [Backspace] :
    • 0 Go back a page in the session history (same as IE)
    • 1 Scroll up in the current document
    • 2 Do nothing
  • accessibility.accesskeycausesactivation
    bool
    UI Key Navigation Accesibility
    Activate the element (e.g. follow a link) using an access key
    • true ☑
    • false ☐
  • bidi.browser.ui
    bool
    UI Bidi
    Enable Bi-Directional (BiDi) UI
    • true ☑
    • false ☐
  • bidi.direction
    int
    UI Bidi
    -> Left-to-right
    • 1 -> Left-to-right
    • 2 <- Right-to-left
  • bidi.numeral
    int
    UI Bidi
    Nominal
    • 0 Nominal
    • 1 Regular context
    • 2 Hindi context
    • 3 Arabic
    • 4 Hindi
    • 5 Persian context
    • 6 Persian
  • bidi.texttype
    int
    UI Bidi
    Default
    • 1 Default
    • 2 Logical
    • 3 Visual
  • layout.scrollbar.side
    int
    UI Bidi Place the vertical scrollbar on:
    Place the vertical scrollbar on:
    • 0 Right in LTR, Left in RTL, based on the Firefox's direction.(Default)
    • 1 Right in LTR, Left in RTL, based on the document's direction.
    • 2 Right side
    • 3 Left side
  • general.useragent.locale
    string
    UI i18n
    Application Locale
  • intl.locale.matchOS
    bool
    UI i18n
    Use the OS's locale
    • true ☑
    • false ☐
  • layout.spellcheckDefault
    int
    UI i18n Spellchecker Setting
    Spellchecker Setting
    • 0 Disables spellchecker
    • 1 Enables spellchecker for multi-line controls (e.g. textarea) (Default)
    • 2 Enables spellchecker for all text controls
  • layout.enable_japanese_specific_transform
    bool
    UI i18n
    Replaces backslash with Yen signs in Japanese-encoded document
    • true ☑
    • false ☐
  • ui.click_hold_context_menus
    bool
    UI Context menu
    Enable click-and-hold context menus (Emulate old Mac OS interface)
    • true ☑
    • false ☐
  • ui.submenuDelay
    int
    UI Context menu Submenu Delay
    • -1 to +∞
  • browser.taskbar.lists.enabled
    bool
    UI Taskbar Jumplist (Windows 7+)
    Enable Jumplist
    • true ☑
    • false ☐
  • browser.taskbar.lists.frequent.enabled
    bool
    UI Taskbar Jumplist (Windows 7+)
    Frequent
    • true ☑
    • false ☐
  • browser.taskbar.lists.recent.enabled
    bool
    UI Taskbar Jumplist (Windows 7+)
    Recent
    • true ☑
    • false ☐
  • browser.taskbar.lists.tasks.enabled
    bool
    UI Taskbar Jumplist (Windows 7+)
    Tasks
    • true ☑
    • false ☐
  • browser.taskbar.lists.maxListItemCount
    int
    UI Taskbar Jumplist (Windows 7+)
    Maximum number of items per list
    • 0 to +∞
  • browser.taskbar.lists.refreshInSeconds
    int
    UI Taskbar Jumplist (Windows 7+)
    Refresh list items every
    • 1 to +∞
  • layout.css.devPixelsPerPx
    string
    UI Other DPI Scaling Level
    • -1.0 to +∞ , step by 0.01
  • clipboard.autocopy
    bool
    UI Other Unix (X-Window) style mouse behavior
    Enable auto-copy selected text (takes effect only *nix)
    • true ☑
    • false ☐
  • middlemouse.paste
    bool
    UI Other Unix (X-Window) style mouse behavior
    Paste when clicked middle mouse button
    • true ☑
    • false ☐
  • middlemouse.contentLoadURL
    bool
    UI Other Unix (X-Window) style mouse behavior
    Go to URL stored in clipboard by middle mouse click
    • true ☑
    • false ☐
  • middlemouse.scrollbarPosition
    bool
    UI Other Unix (X-Window) style mouse behavior
    Allow middle mouse button to adjust scroll bar (takes effect after restart)
    • true ☑
    • false ☐
  • layout.word_select.eat_space_to_next_word
    bool
    UI Other Selection behavior when double-clicking text
    Select the space up to the following word
    • true ☑
    • false ☐
  • layout.word_select.stop_at_punctuation
    bool
    UI Other Selection behavior when double-clicking text
    Select the surrounding punctuation
    • true ☐
    • false ☑
  • nglayout.enable_drag_images
    bool
    UI Other
    Display an image (when specified) during dragging
    • true ☑
    • false ☐
  • ui.allow_platform_file_picker
    bool
    UI Other
    Use XUL file picker even if system file picker is available
    • true ☐
    • false ☑
  • extensions.getAddons.maxResults
    int
    Add-ons
    Maximum number of search results to display :
    • 1 to +∞
  • security.dialog_enable_delay
    int
    Add-ons
    Delay before starting add-on installations :
    • 0 to +∞
  • xpinstall.customConfirmationUI
    bool
    Add-ons
    Use the old prompt window for the addon installing approval
    • true ☐
    • false ☑
  • extensions.checkCompatibility.45.0
    bool
    Add-ons Do Not check add-on compatibility with :
    45
    • true ☐
    • false ☑
  • extensions.checkCompatibility.46.0
    bool
    Add-ons Do Not check add-on compatibility with :
    46
    • true ☐
    • false ☑
  • extensions.checkCompatibility.47.0
    bool
    Add-ons Do Not check add-on compatibility with :
    47
    • true ☐
    • false ☑
  • extensions.checkCompatibility.48.0
    bool
    Add-ons Do Not check add-on compatibility with :
    48
    • true ☐
    • false ☑
  • extensions.checkCompatibility.49.0
    bool
    Add-ons Do Not check add-on compatibility with :
    49
    • true ☐
    • false ☑
  • extensions.checkCompatibility.50.0
    bool
    Add-ons Do Not check add-on compatibility with :
    50
    • true ☐
    • false ☑
  • extensions.checkCompatibility.51.0
    bool
    Add-ons Do Not check add-on compatibility with :
    51
    • true ☐
    • false ☑
  • extensions.checkCompatibility.52.0
    bool
    Add-ons Do Not check add-on compatibility with :
    52
    • true ☐
    • false ☑
  • extensions.checkCompatibility.53.0
    bool
    Add-ons Do Not check add-on compatibility with :
    53
    • true ☐
    • false ☑
  • extensions.checkCompatibility.54.0
    bool
    Add-ons Do Not check add-on compatibility with :
    54
    • true ☐
    • false ☑
  • extensions.checkCompatibility.55.0
    bool
    Add-ons Do Not check add-on compatibility with :
    55
    • true ☐
    • false ☑
  • extensions.checkCompatibility.56.0
    bool
    Add-ons Do Not check add-on compatibility with :
    56
    • true ☐
    • false ☑
  • extensions.checkUpdateSecurity
    bool
    Add-ons
    Do Not check secure updates of add-ons
    • true ☐
    • false ☑
  • extensions.install.requireBuiltInCerts
    bool
    Add-ons
    Allow non-built-in certs to be used for downloading XPIs and update.
    • true ☐
    • false ☑
  • extensions.alwaysUnpack
    bool
    Add-ons
    Always unpack XPI file
    • true ☑
    • false ☐
  • browser.dom.window.dump.enabled
    bool
    Debug For Debugging
    Enable JavaScript dump() output
    • true ☑
    • false ☐
  • browser.dom.window.dump.file
    string
    Debug For Debugging
    Output file:
  • javascript.options.strict
    bool
    Debug For Debugging
    Show strict JavaScript warnings
    • true ☑
    • false ☐
  • javascript.options.showInConsole
    bool
    Debug For Debugging
    Show chrome JavaScript errors & warnings
    • true ☑
    • false ☐
  • layout.css.report_errors
    bool
    Debug For Debugging
    Show CSS parse errors
    • true ☑
    • false ☐
  • extensions.logging.enabled
    bool
    Debug For Debugging
    Show errors & warnings about addon installation and update
    • true ☑
    • false ☐
  • devtools.chrome.enabled
    bool
    Debug Developer Tools
    Enable to run JavaScript code in the chrome context of the Scratchpad.
    • true ☑
    • false ☐
  • devtools.debugger.remote-enabled
    bool
    Debug Developer Tools
    Enable remote debugging
    • true ☑
    • false ☐
  • ui.popup.disable_autohide
    bool
    Debug
    Disable popup auto hide. (i.e. Keep popup panel open when you click away from them and into such as debugging tool)
    • true ☑
    • false ☐
  • nglayout.debug.disable_xul_cache
    bool
    Debug Cache
    Disable XUL Cache
    • true ☑
    • false ☐
  • browser.cache.disk.enable
    bool
    Debug Cache
    Disable Disk Cache
    • true ☐
    • false ☑