This is difference between the default preference of Firefox 61.0 beta 7 and one of 60.0.1.

Preference difference
PrefFirefox 60.0.1Firefox 61.0 beta 7
app.normandy.run_interval_seconds8640021600
app.update.url.detailshttps://www.mozilla.org/%LOCALE%/firefox/noteshttps://www.mozilla.org/%LOCALE%/firefox/beta/notes
app.update.url.manualhttps://www.mozilla.org/firefox/https://www.mozilla.org/firefox/beta
apz.android.chrome_fling_physics.enabledundefinedfalse
apz.android.chrome_fling_physics.frictionundefined0.015
apz.android.chrome_fling_physics.inflexionundefined0.35
apz.android.chrome_fling_physics.stop_thresholdundefined0.1
apz.max_tap_timeundefined300
apz.minimap.visibility.enabledfalseundefined
browser.cache.offline.insecure.enabletruefalse
browser.startup.blankWindowfalsetrue
browser.storageManager.enabledtrueundefined
browser.tabs.20FpsThrobberundefinedfalse
browser.tabs.30FpsThrobberundefinedfalse
browser.tabs.closeTabByDblclickundefinedfalse
browser.tabs.insertAfterCurrentundefinedfalse
browser.tabs.remote.warmup.enabledfalsetrue
browser.tabs.restorebutton0undefined
device.sensors.ambientLight.enabledtruefalse
device.sensors.proximity.enabledtruefalse
devtools.accessibility.enabledundefinedfalse
devtools.application.enabledundefinedfalse
devtools.browserconsole.filter.csserrortrueundefined
devtools.browserconsole.filter.csslogfalseundefined
devtools.browserconsole.filter.cssparserfalseundefined
devtools.browserconsole.filter.exceptiontrueundefined
devtools.browserconsole.filter.jslogtrueundefined
devtools.browserconsole.filter.jswarntrueundefined
devtools.browserconsole.filter.netwarntrueundefined
devtools.browserconsole.filter.networktrueundefined
devtools.browserconsole.filter.networkinfofalseundefined
devtools.browserconsole.filter.secerrortrueundefined
devtools.browserconsole.filter.secwarntrueundefined
devtools.browserconsole.filter.servererrorfalseundefined
devtools.browserconsole.filter.serverinfofalseundefined
devtools.browserconsole.filter.serverlogfalseundefined
devtools.browserconsole.filter.serverwarnfalseundefined
devtools.browserconsole.filter.serviceworkerstrueundefined
devtools.browserconsole.filter.sharedworkerstrueundefined
devtools.browserconsole.filter.windowlessworkerstrueundefined
devtools.browserconsole.htmlundefinedfalse
devtools.browserconsole.new-frontend-enabledfalseundefined
devtools.changesview.enabledfalseundefined
devtools.computed.boxmodel.openedtrueundefined
devtools.debugger.alphabetize-outlineundefinedfalse
devtools.debugger.component-stack-visibleundefinedtrue
devtools.debugger.component-visibleundefinedtrue
devtools.debugger.features.breakpoints-dropdownfalseundefined
devtools.debugger.features.component-stackundefinedfalse
devtools.debugger.features.map-scopesfalsetrue
devtools.debugger.features.pause-pointsundefinedtrue
devtools.debugger.features.skip-pausingundefinedfalse
devtools.debugger.skip-pausingundefinedfalse
devtools.debugger.tabsBlackBoxedundefined[]
devtools.devedition.promo.enabledfalsetrue
devtools.eventsview.enabledfalseundefined
devtools.hud.loglimit.console1000undefined
devtools.hud.loglimit.cssparser1000undefined
devtools.hud.loglimit.exception1000undefined
devtools.hud.loglimit.network1000undefined
devtools.inspector.colorWidget.enabledfalseundefined
devtools.inspector.fonteditor.enabledundefinedfalse
devtools.inspector.show-three-pane-tooltipundefinedfalse
devtools.inspector.split-rule-enabledfalseundefined
devtools.inspector.split-sidebar-togglefalseundefined
devtools.inspector.three-pane-enabledundefinedfalse
devtools.inspector.three-pane-toggleundefinedfalse
devtools.netmonitor.responseBodyLimitundefined1048576
devtools.netmonitor.saveRequestAndResponseBodiesundefinedtrue
devtools.toolbox.tabsOrderundefined
devtools.webconsole.filter.csserrortrueundefined
devtools.webconsole.filter.csslogfalseundefined
devtools.webconsole.filter.cssparserfalseundefined
devtools.webconsole.filter.exceptiontrueundefined
devtools.webconsole.filter.jslogfalseundefined
devtools.webconsole.filter.jswarntrueundefined
devtools.webconsole.filter.netwarntrueundefined
devtools.webconsole.filter.networktrueundefined
devtools.webconsole.filter.networkinfofalseundefined
devtools.webconsole.filter.secerrortrueundefined
devtools.webconsole.filter.secwarntrueundefined
devtools.webconsole.filter.servererrorfalseundefined
devtools.webconsole.filter.serverinfofalseundefined
devtools.webconsole.filter.serverlogfalseundefined
devtools.webconsole.filter.serverwarnfalseundefined
devtools.webconsole.filter.serviceworkerstrueundefined
devtools.webconsole.filter.sharedworkersfalseundefined
devtools.webconsole.filter.windowlessworkersfalseundefined
devtools.webconsole.new-frontend-enabledtrueundefined
dom.animations-api.pending-member.enabledtrueundefined
dom.compartment_per_addontrueundefined
dom.event.default_to_passive_touch_listenersundefinedtrue
dom.forms.numbertrueundefined
dom.indexedDB.storageOption.enabledundefinedfalse
dom.ipc.cpows.allow-cpows-in-compat-addons{b9db16a4-6edc-47ec-a1f4-b86292ed211d},firegestures@xuldev.org,{DDC359D1-844A-42a7-9AA1-88A850A938A8},privateTab@infocatcher,mousegesturessuite@lemon_juice.addons.mozilla.org,treestyletab@piro.sakura.ne.jp,cliqz@cliqz.com,{AE93811A-5C9A-4d34-8462-F7B864FC4696},contextsearch2@lwz.addons.mozilla.org,{EF522540-89F5-46b9-B6FE-1829E2B572C6},{677a8f98-fd64-40b0-a883-b8c95d0cbf17},images@wink.su,fx-devtools,url_advisor@kaspersky.com,{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d},{dc572301-7619-498c-a57d-39143191b318},dta@downthemall.net,{86095750-AD15-46d8-BF32-C0789F7E6A32},screenwise-prod@google.com,{91aa5abe-9de4-4347-b7b5-322c38dd9271},secureLogin@blueimp.net,ich@maltegoetz.de,come.back.block.image.from@cat-in-136.blogspot.com,{7b1bf0b6-a1b9-42b0-b75d-252036438bdc},s3crypto@data,{1e0fd655-5aea-4b4c-a583-f76ef1e3af9c},akahuku.fx.sp@toshiakisp.github.io,{aff87fa2-a58e-4edd-b852-0a20203c1e17},{1018e4d6-728f-4b20-ad56-37578a4de76b},rehostimage@engy.us,lazarus@interclue.com,{b2e69492-2358-071a-7056-24ad0c3defb1},flashstopper@byo.co.il,{e4a8a97b-f2ed-450b-b12d-ee082ba24781},jid1-f3mYMbCpz2AZYl@jetpack,{8c550e28-88c9-4764-bb52-aa489cf2efcd},{37fa1426-b82d-11db-8314-0800200c9a66},{ac2cfa60-bc96-11e0-962b-0800200c9a66},igetter@presenta.net,killspinners@byo.co.il,abhere2@moztw.org,{fc6339b8-9581-4fc7-b824-dffcb091fcb7},wampi@wink.su,backtrack@byalexv.co.uk,Gladiator_X@mail.ru,{73a6fe31-595d-460b-a920-fcc0f8843232},{46551EC9-40F0-4e47-8E18-8E5CF550CFB8},acewebextension_unlisted@acestream.org,@screen_maker,yasearch@yandex.ru,sp@avast.com,s3google@translator,igetterextension@presenta.net,{C1A2A613-35F1-4FCF-B27F-2840527B6556},screenwise-testing@google.com,helper-sig@savefrom.net,ImageSaver@Merci.chao,proxtube@abz.agency,wrc@avast.com,{9AA46F4F-4DC7-4c06-97AF-5035170634FE},jid1-CikLKKPVkw6ipw@jetpack,artur.dubovoy@gmail.com,nlgfeb@nlgfeb.ext,{A065A84F-95B6-433A-A0C8-4C040B77CE8A},fdm_ffext@freedownloadmanager.orgundefined
dom.ipc.cpows.forbid-cpows-in-compat-addonstrueundefined
dom.ipc.schedulerfalseundefined
dom.keyboardevent.dispatch_during_compositionfalsetrue
dom.performance.enable_scheduler_timingundefinedfalse
dom.performance.time_to_dom_content_flushed.enabledundefinedfalse
dom.push.loglevelerrorError
dom.registerContentHandler.enabledtruefalse
dom.requestcontext.enabledfalseundefined
dom.use_components_shimundefinedtrue
dom.vr.external.enabledundefinedfalse
experiments.enabledtrueundefined
experiments.manifest.fetchIntervalSeconds86400undefined
experiments.manifest.urihttps://telemetry-experiment.cdn.mozilla.net/manifest/v1/firefox/%VERSION%/%CHANNEL%undefined
experiments.supportedtrueundefined
extensions.allow-non-mpc-extensionstrueundefined
extensions.dss.switchPendingfalseundefined
extensions.langpacks.signatures.requiredfalsetrue
extensions.legacy.exceptions{972ce4c6-7e08-4474-a285-3208198ce6fd},testpilot@cliqz.com,@testpilot-containers,jid1-NeEaf3sAHdKHPA@jetpack,@activity-streams,pulse@mozilla.com,@testpilot-addon,@min-vid,tabcentertest1@mozilla.com,snoozetabs@mozilla.com,speaktome@mozilla.com,hoverpad@mozilla.comtestpilot@cliqz.com,@testpilot-containers,jid1-NeEaf3sAHdKHPA@jetpack,@activity-streams,pulse@mozilla.com,@testpilot-addon,@min-vid,tabcentertest1@mozilla.com,snoozetabs@mozilla.com,speaktome@mozilla.com,hoverpad@mozilla.com
extensions.webextensions.background-delayed-startupundefinedfalse
extensions.webextensions.tabhide.enabledfalsetrue
extensions.{972ce4c6-7e08-4474-a285-3208198ce6fd}.descriptionchrome://browser/locale/browser.propertiesundefined
extensions.{972ce4c6-7e08-4474-a285-3208198ce6fd}.namechrome://browser/locale/browser.propertiesundefined
font.name-list.emojiEmojiOne MozillaTwemoji Mozilla
full-screen-api.unprefix.enabledfalseundefined
general.skins.selectedSkinclassic/1.0undefined
geo.provider.use_gpsdfalseundefined
geo.wifi.urihttps://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_API_KEY%https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%
gfx.downloadable_fonts.keep_variation_tablesfalseundefined
gfx.downloadable_fonts.validate_variation_tablesundefinedtrue
gfx.font_rendering.opentype_svg.enabledtrueundefined
gfx.webrender.async-scene-buildundefined2
gfx.webrender.blob.invalidationundefinedtrue
html5.flushtimer.initialdelay120undefined
html5.flushtimer.subsequentdelay120undefined
html5.offmainthreadtrueundefined
identity.fxaccounts.messages.enabledundefinedfalse
image.mem.shared2true
intl.ime.hack.on_any_apps.fire_key_events_for_compositionundefinedfalse
intl.ime.hack.uim.using_key_snooperundefinedtrue
javascript.options.compact_on_user_inactivetrueundefined
javascript.options.compact_on_user_inactive_delay300000undefined
javascript.options.gc_on_memory_pressuretrueundefined
javascript.options.mem.logfalseundefined
javascript.options.mem.notifyfalseundefined
layers.advanced.background-colorfalseundefined
layers.advanced.background-image2undefined
layers.advanced.border-layers2undefined
layers.advanced.bullet-layers2undefined
layers.advanced.canvas-background-color2undefined
layers.advanced.caret-layersfalseundefined
layers.advanced.columnRule-layers2undefined
layers.advanced.image-layers2undefined
layers.advanced.outline-layers2undefined
layers.advanced.solid-colorfalseundefined
layers.advanced.tablefalseundefined
layers.enable-tiles-if-skia-pomtpundefinedfalse
layers.omtp.paint-workers1-1
layers.tile-height256512
layers.tile-width256512
layers.tiles.edge-paddingundefinedfalse
layers.tiles.retain-back-bufferundefinedtrue
layout.accessiblecaret.always_show_when_scrollingtrueundefined
layout.css.control-characters.visiblefalseundefined
layout.css.expensive-style-struct-assertions.enabledfalseundefined
layout.css.float-logical-values.enabledtrueundefined
layout.css.font-display.enabledtrueundefined
layout.css.font-variations.enabledfalseundefined
layout.css.frames-timing.enabledfalseundefined
layout.css.getPropertyCSSValue.enabledundefinedfalse
layout.css.grid-template-subgrid-value.enabledfalseundefined
layout.css.moz-document.content.enabledtrueundefined
layout.css.prefixes.device-pixel-ratio-webkitfalseundefined
layout.css.prefixes.gradientstrueundefined
layout.css.prefixes.webkittrueundefined
layout.css.scope-pseudo.enabledtrueundefined
layout.css.scoped-style.enabledfalseundefined
layout.css.servo.chrome.enabledtrueundefined
layout.css.servo.enabledtrueundefined
layout.css.text-combine-upright.enabledtrueundefined
layout.css.visited_links_enabledtrueundefined
layout.display-list.retainfalsetrue
lightweightThemes.selectedThemeIDdefault-theme@mozilla.org
marionette.contentListenerundefinedfalse
media.audioipc.pool_sizeundefined2
media.audioipc.stack_sizeundefined262144
media.cache_readahead_limit60undefined
media.cache_resume_threshold30undefined
media.cache_size512000undefined
media.decoder-doctor.wmf-disabled-is-failurefalseundefined
media.decoder.recycle.enabledfalseundefined
media.decoder.skip-to-next-key-frame.enabledtrueundefined
media.dormant-on-pause-timeout-ms5000undefined
media.eme.chromium-api.video-shmems6undefined
media.eme.enabledfalseundefined
media.ffmpeg.enabledtrueundefined
media.ffmpeg.low-latency.enabledfalseundefined
media.ffvpx.enabledtrueundefined
media.flac.enabledtrueundefined
media.gmp.decoder.enabledfalseundefined
media.gmp.insecure.allowfalseundefined
media.libavcodec.allow-obsoletefalseundefined
media.mediasource.experimental.enabledundefinedfalse
media.memory_cache_max_size8192undefined
media.memory_caches_combined_limit_kb524288undefined
media.memory_caches_combined_limit_pc_sysmem5undefined
media.mp4.enabledtrueundefined
media.navigator.mediadatadecoder_enabledfalseundefined
media.ogg.enabledtrueundefined
media.ogg.flac.enabledtrueundefined
media.playback.warnings-as-errorsfalseundefined
media.resume-bkgnd-video-on-tabhovertrueundefined
media.seamless-loopingtrueundefined
media.suspend-bkgnd-video.delay-ms10000undefined
media.suspend-bkgnd-video.enabledtrueundefined
media.use-blank-decoderfalseundefined
media.webaudio.audiocontextoptions-samplerate.enabledundefinedtrue
media.webspeech.recognition.enablefalseundefined
mousewheel.autodir.enabledundefinedfalse
mousewheel.autodir.honourrootundefinedfalse
network.auth.non-web-content-triggered-resources-http-auth-allowfalseundefined
network.auth.subresource-http-auth-allow2undefined
network.auth.subresource-img-cross-origin-http-auth-allowfalseundefined
network.cookie.move.interval_secundefined10
network.http.fallback-connection-timeoutundefined5
network.http.throttle.version12
network.jar.block-remote-filestrueundefined
network.jar.open-unsafe-typesfalseundefined
network.predictor.cleaned-upfalseundefined
network.predictor.enable-hover-on-sslfalseundefined
network.predictor.enable-prefetchfalseundefined
network.predictor.enabledtrueundefined
network.predictor.max-resources-per-entry100undefined
network.predictor.max-uri-length500undefined
network.predictor.page-degradation.day0undefined
network.predictor.page-degradation.max50undefined
network.predictor.page-degradation.month10undefined
network.predictor.page-degradation.week5undefined
network.predictor.page-degradation.year25undefined
network.predictor.preconnect-min-confidence90undefined
network.predictor.prefetch-force-valid-for10undefined
network.predictor.prefetch-min-confidence100undefined
network.predictor.prefetch-rolling-load-count10undefined
network.predictor.preresolve-min-confidence60undefined
network.predictor.redirect-likely-confidence75undefined
network.predictor.subresource-degradation.day1undefined
network.predictor.subresource-degradation.max100undefined
network.predictor.subresource-degradation.month25undefined
network.predictor.subresource-degradation.week10undefined
network.predictor.subresource-degradation.year50undefined
network.trr.blacklist-duration2592001200
preferences.allow.omt-writetrueundefined
security.block_ftp_subresourcesundefinedtrue
security.pki.mitm_canary_issuerundefined
security.pki.mitm_canary_issuer.enabledundefinedtrue
security.sandbox.logging.enabledtrueundefined
services.blocklist.changes.path/buckets/monitor/collections/changes/recordsundefined
services.blocklist.signing.enforcedtrueundefined
services.settings.changes.pathundefined/buckets/monitor/collections/changes/records
services.settings.default_bucketundefinedmain
services.settings.default_signerundefinedremote-settings.content-signature.mozilla.org
services.sync.engine.bookmarks.validation.enabledundefinedtrue
services.sync.engine.passwords.validation.enabledundefinedtrue
svg.path-caching.enabledtrueundefined
toolkit.telemetry.infoURLhttps://www.mozilla.org/legal/privacy/firefox.html#telemetryundefined
view_source.editor.externalfalseundefined
Default pref Javascript files
PrefFirefox 60.0.1Firefox 61.0 beta 7
browser/omni.ja.d/defaults/preferences/debugger.jspresentpresent
browser/omni.ja.d/defaults/preferences/devtools-startup-prefs.jspresentnot present
browser/omni.ja.d/defaults/preferences/devtools.jspresentnot present
browser/omni.ja.d/defaults/preferences/devtools-client.jsnot presentpresent
browser/omni.ja.d/defaults/preferences/devtools-startup.jsnot presentpresent
browser/omni.ja.d/defaults/preferences/firefox-branding.jspresentpresent
browser/omni.ja.d/defaults/preferences/firefox-l10n.jspresentpresent
browser/omni.ja.d/defaults/preferences/firefox.jspresentpresent
browser/omni.ja.d/defaults/preferences/webide-prefs.jspresentnot present
browser/omni.ja.d/defaults/preferences/webide.jsnot presentpresent
omni.ja.d/defaults/pref/marionette.jspresentpresent
omni.ja.d/defaults/pref/services-sync.jspresentpresent
omni.ja.d/greprefs.jspresentpresent