This is difference between the default preference of Firefox 110.0 beta 3 and one of 109.0. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 110.0Firefox 111.0 beta 4
accessibility.cache.enabled false true
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-browser&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.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
browser.aboutwelcome.templateMR true undefined
browser.cache.offline.enable true false
browser.chrome.toolbar_tips.hide_on_keydown undefined 2
browser.contentblocking.report.monitor.enabled true false
browser.display.use_document_fonts.icon_font_allowlist undefined Material Icons, Material Icons Extended, Material Icons Outlined, Material Icons Round, Material Icons Sharp, Material Icons Two Tone, Google Material Icons, Material Symbols Outlined, Material Symbols Round, Material Symbols Rounded, Material Symbols Sharp
browser.download.animateNotifications true undefined
browser.history_swipe_animation.disabled false undefined
browser.migrate.content-modal.import-all.enabled undefined false
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.search.serpEventTelemetry.enabled undefined false
browser.sessionstore.idleDelay 180000 180
browser.swipe.navigation-icon-end-position undefined 60
browser.swipe.navigation-icon-max-radius undefined 20
browser.swipe.navigation-icon-min-radius undefined 12
browser.swipe.navigation-icon-move-distance 100 undefined
browser.swipe.navigation-icon-start-position undefined -40
browser.theme.colorway-migration false true
browser.translations.enable undefined false
browser.translations.logLevel undefined Error
browser.urlbar.quickactions.enabled undefined true
browser.urlbar.quickactions.showPrefs undefined true
browser.urlbar.resultMenu false true
browser.urlbar.shortcuts.quickactions undefined true
browser.urlbar.showSearchTerms.featureGate false true
browser.urlbar.suggest.quickactions undefined true
browser.urlbar.weather.zeroPrefix undefined true
cookiebanners.service.detectOnly undefined false
cookiebanners.ui.desktop.cfrVariant undefined 0
devtools.storage.extensionStorage.enabled true undefined
docshell.shistory.bfcache.ship_allow_beforeunload_listeners false true
dom.clamp.timeout.nesting.level undefined 5
dom.customHighlightAPI.enabled undefined false
dom.document.edit_command.contentReadOnly.enabled true false
dom.document.edit_command.insertBrOnReturn.enabled true false
dom.forms.autocapitalize false true
dom.fs.enabled false true
dom.fs.writable_file_stream.enabled false true
dom.media.autoplay.autoplay-policy-api false undefined
dom.mozTextStyle.enabled true false
dom.quotaManager.backgroundTask.enabled undefined false
dom.security.credentialmanagement.identity.test_ignore_well_known undefined false
dom.security.secFetch.enabled true undefined
dom.use_counters.dump.document undefined false
dom.use_counters.dump.page undefined false
dom.use_counters.dump.worker undefined false
dom.webgpu.indirect-dispatch.enabled undefined false
dom.workers.modules.enabled undefined false
dom.workers.pFetch.enabled undefined false
extensions.InstallTrigger.enabled true false
extensions.unifiedExtensions.enabled true undefined
extensions.webcompat-reporter.enabled false true
fission.experiment.enrollmentStatus 0 undefined
fission.experiment.startupEnrollmentStatus 0 undefined
fission.omitBlocklistedPrefsInSubprocesses 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.use-ahardwarebuffer-content false undefined
gfx.webrender.dcomp-apply-1704954 undefined true
html5.inert.enabled false true
identity.fxaccounts.toolbar.defaultVisible undefined false
image.avif.sequence.animate_avif_major_branded_images undefined false
image.avif.sequence.enabled undefined false
layout.css.more_color_4.enabled undefined false
layout.css.page-orientation.enabled undefined false
layout.css.scroll-anchoring.max-consecutive-adjustments-timeout-ms undefined 500
layout.css.scroll-anchoring.min-average-adjustment-threshold 3 2
layout.dynamic-reflow-roots.enabled false true
media.ffmpeg.vaapi.force-surface-copy undefined false
media.getusermedia.camera.macavf.enabled false true
media.webrtc.platformencoder.sw_mft false true
network.cache.frecency_array_check_enabled false true
network.cookie.blockUnicode undefined false
network.cookie.sameSite.noneRequiresSecure false true
network.dns.max_any_priority_threads undefined 3
network.dns.max_high_priority_threads undefined 5
network.early-hints.enabled false true
network.early-hints.preconnect.enabled false true
network.fetch.redirect.stripAuthHeader undefined true
network.http.redirect.stripAuthHeader undefined true
network.jar.record_failure_reason false true
network.predictor.enable-prefetch false true
network.trr.display_fallback_warning undefined false
network.trr.fallback_warning_heuristic_list undefined canary
places.loglevel undefined Error
print.pages_per_sheet.enabled true undefined
privacy.annotate_channels.strict_list.enabled false true
privacy.annotate_channels.strict_list.pbmode.enabled false true
privacy.authPromptSpoofingProtection undefined true
privacy.restrict3rdpartystorage.preferences.learnMoreURLSuffix total-cookie-protection undefined
security.block_fileuri_script_with_wrong_mime false true
security.disallow_non_local_systemprincipal_in_tests undefined false
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
security.webauthn.ctap2 false true
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
svg.display-lists.hit-testing.enabled true undefined
svg.display-lists.painting.enabled true undefined
svg.nearestAndFarthestViewportElement.enabled true false
threads.use_low_power.enabled undefined false
toolkit.aboutProcesses.showProfilerIcons false true
toolkit.telemetry.enabled false true
webgl.enable-ahardwarebuffer false undefined