This is difference between the default preference of Firefox 117.0 beta 3 and one of 116.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 117.0.1Firefox 117.0 beta 3
app.normandy.test-prefs.bool undefined false
app.normandy.test-prefs.integer undefined 0
app.normandy.test-prefs.string undefined
app.releaseNotesURL https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_campaign=whatsnew https://www.mozilla.org/%LOCALE%/firefox/%VERSION%beta/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-desktop&utm_campaign=whatsnew
app.releaseNotesURL.aboutDialog https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-desktop&utm_campaign=about-dialog https://www.mozilla.org/%LOCALE%/firefox/%VERSION%beta/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-desktop&utm_campaign=about-dialog
app.releaseNotesURL.prompt https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_campaign=updateprompt https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-desktop&utm_campaign=updateprompt
app.update.channel release beta
app.update.url.details https://www.mozilla.org/%LOCALE%/firefox/notes https://www.mozilla.org/%LOCALE%/firefox/beta/notes
app.update.url.manual https://www.mozilla.org/%LOCALE%/firefox/new?reason=manual-update https://www.mozilla.org/%LOCALE%/firefox/beta?reason=manual-update
apz.scrollthumb.recalc false true
browser.contentblocking.report.vpn_platforms win,mac,linux undefined
browser.firefox-view.max-history-rows undefined 500
browser.migrate.content-modal.about-welcome-behavior legacy embedded
browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.searchEngines google,amazon
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.opaqueResponseBlocking false true
browser.opaqueResponseBlocking.javascriptValidator false true
browser.sessionstore.closedTabsFromAllWindows undefined false
browser.sessionstore.persist_closed_tabs_between_sessions undefined false
browser.shopping.experience2023.optedIn undefined 0
browser.topsites.contile.sov.enabled false true
browser.translations.enable false true
browser.urlbar.quickactions.enabled undefined true
browser.urlbar.quickactions.showPrefs undefined true
browser.urlbar.shortcuts.quickactions undefined true
browser.urlbar.showSearchTerms.featureGate false true
browser.urlbar.suggest.mdn undefined true
browser.urlbar.suggest.quickactions undefined true
browser.urlbar.trending.featureGate undefined true
canvas.image.cache.limit 0 undefined
cookiebanners.ui.desktop.enabled false true
devtools.inspector.ruleview.inline-compatibility-warning.enabled false true
devtools.markup.mutationBreakpoints.enabled true undefined
dom.allow_XUL_XBL_for_file false undefined
dom.audioworklet.enabled true undefined
dom.block_download_in_sandboxed_iframes true undefined
dom.caches.enabled true undefined
dom.crypto.randomUUID.enabled true undefined
dom.dialog_element.enabled true undefined
dom.document.edit_command.contentReadOnly.enabled true false
dom.document.edit_command.insertBrOnReturn.enabled true false
dom.event.contextmenu.shift_suppresses_event undefined true
dom.event.default_to_passive_touch_listeners true undefined
dom.input.showPicker true undefined
dom.input_events.beforeinput.enabled true undefined
dom.media.mozPreservesPitch.enabled false undefined
dom.moduleScripts.enabled true undefined
dom.requestIdleCallback.enabled true undefined
dom.shadowdom.delegatesFocus.enabled true undefined
dom.streams.from.enabled undefined true
dom.webnotifications.allowinsecure false undefined
dom.webnotifications.serviceworker.enabled true undefined
dom.window.content.untrusted.enabled false undefined
dom.window.history.async true undefined
dom.window.open.noreferrer.enabled true undefined
dom.window.sizeToContent.enabled undefined true
dom.workers.importScripts.enforceStrictMimeType false true
dom.worklet.enabled true undefined
dom.xhr.standard_content_type_normalization true undefined
extensions.InstallTrigger.enabled true false
extensions.formautofill.creditCards.available true undefined
extensions.formautofill.creditCards.supportedCountries US,CA,GB,FR,DE US,CA,GB,FR,DE,IT,ES,AT,BE,PL
extensions.webcompat-reporter.enabled false true
fission.enforceBlocklistedPrefsInSubprocesses false true
geo.provider.network.url https://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_LOCATION_SERVICE_API_KEY% https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%
gfx.webrender.enabled false undefined
gfx.x11.glx_sgi_video_sync undefined false
image.mem.shared true undefined
intl.uidirection -1 undefined
javascript.options.wasm_function_references undefined false
javascript.options.wasm_gc undefined false
layout.css.accent-color.enabled true undefined
layout.css.allow-mixed-page-sizes false true
layout.css.basic-shape-rect.enabled undefined false
layout.css.basic-shape-xywh.enabled undefined false
layout.css.color-scheme.enabled true undefined
layout.css.computed-style.new-invalid-pseudo-element-behavior true undefined
layout.css.constructable-stylesheets.enabled true undefined
layout.css.light-dark.enabled undefined false
layout.css.math-depth.enabled false true
layout.css.math-style.enabled false true
layout.css.nesting.enabled false true
layout.css.step-position-jump.enabled true undefined
layout.css.webkit-range-pseudos.enabled undefined false
layout.dynamic-reflow-roots.enabled false true
layout.scrollbars.click_and_hold_track.continue_to_end undefined true
mathml.legacy_mathvariant_attribute.disabled undefined false
mathml.ms_lquote_rquote_attributes.disabled true undefined
mathml.scriptminsize_attribute.disabled true undefined
mathml.scriptsizemultiplier_attribute.disabled true undefined
media.peerconnection.dtmf.enabled true undefined
media.peerconnection.identity.enabled true undefined
media.peerconnection.scripttransform.enabled undefined true
media.resume-background-video-on-tabhover undefined true
media.resume-bkgnd-video-on-tabhover true undefined
media.suspend-background-video.delay-ms undefined 10000
media.suspend-background-video.enabled undefined true
media.suspend-bkgnd-video.delay-ms 10000 undefined
media.suspend-bkgnd-video.enabled true undefined
media.webrtc.platformencoder false true
media.webvtt.regions.enabled true undefined
network.cookie.sameSite.noneRequiresSecure false true
network.early-hints.enabled false true
network.early-hints.preconnect.enabled false true
network.http.clear_bogus_content_encoding false undefined
network.jar.record_failure_reason false true
network.preconnect undefined true
network.predictor.enable-prefetch false true
pdfjs.enableFloatingToolbar false undefined
pdfjs.enableStampEditor undefined true
pdfjs.useOnlyCssZoom false undefined
privacy.annotate_channels.strict_list.enabled false true
privacy.bounceTrackingProtection.clientBounceDetectionTimerPeriodMS undefined 10000
privacy.bounceTrackingProtection.enableTestMode undefined false
privacy.bounceTrackingProtection.enabled undefined false
privacy.bounceTrackingProtection.requireStatefulBounces undefined false
reader.pocket.ctaVersion undefined
security.alternate_certificate_error_page certerror undefined
security.block_fileuri_script_with_wrong_mime false true
security.crash_tracking.js_load_1.maxCrashes 0 1
security.csp.reporting.limit.count undefined 100
security.csp.reporting.limit.timespan undefined 2
security.disallow_non_local_systemprincipal_in_tests undefined false
security.family_safety.mode 2 undefined
security.remote_settings.crlite_filters.enabled false true
security.ssl3.ecdhe_ecdsa_aes_128_sha true false
security.ssl3.ecdhe_ecdsa_aes_256_sha true false
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
services.sync.prefs.sync.browser.startup.upgradeDialog.enabled undefined true
signon.firefoxRelay.manage_url https://relay.firefox.com https://relay.firefox.com/accounts/profile/?utm_medium=firefox-desktop&utm_source=modal&utm_campaign=limit&utm_content=manage-masks-global
svg.nearestAndFarthestViewportElement.enabled true false
toolkit.shopping.ohttpConfigURL undefined
toolkit.shopping.ohttpRelayURL undefined
toolkit.shopping.useOHTTP undefined false
toolkit.telemetry.enabled false true