This is difference between the default preference of Firefox 95.0 beta 3 and one of 94.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 94.0.1Firefox 95.0 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-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/ https://www.mozilla.org/%LOCALE%/firefox/beta
apz.peek_messages.enabled true undefined
browser.active_color.dark undefined #FF9E9E
browser.anchor_color.dark undefined #9E9EFF
browser.cache.offline.enable true false
browser.display.background_color.dark undefined #1C1B22
browser.display.foreground_color.dark undefined #FBFBFE
browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","messageGroups":["cfr","whats-new-panel","moments-page","aboutwelcome","infobar","spotlight"],"updateCycleInMs":3600000} {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","messageGroups":["cfr","moments-page","aboutwelcome","infobar","spotlight"],"updateCycleInMs":3600000}
browser.newtabpage.activity-stream.improvesearch.topSiteSearchShortcuts.searchEngines google,amazon
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.preferences.moreFromMozilla undefined false
browser.soft_reload.only_force_validate_top_level_document undefined false
browser.tabs.drawInTitlebar undefined 2
browser.tabs.min_inactive_duration_before_unload undefined 600000
browser.theme.content-theme undefined 2
browser.toolbars.bookmarks.2h2020 true undefined
browser.visited_color.dark undefined #D0ADF0
devtools.theme light auto
devtools.theme.show-auto-theme-info undefined true
dom.crypto.randomUUID.enabled undefined true
dom.forms.inputmode false true
dom.image-lazy-loading.root-margin.bottom 300.0 800.0
dom.image-lazy-loading.root-margin.left 300.0 800.0
dom.image-lazy-loading.root-margin.right 300.0 800.0
dom.image-lazy-loading.root-margin.top 300.0 800.0
dom.script_loader.full_parse false undefined
dom.script_loader.full_parse_max_size undefined 10485760
dom.script_loader.full_parse_min_mem undefined 2
dom.vr.webxr.quantization undefined 0.05
dom.window.content.untrusted.enabled true false
dom.window.sidebar.enabled true false
editor.hr_element.allow_to_delete_from_following_line false true
extensions.filterResponseServiceWorkerScript.disabled undefined false
extensions.webcompat-reporter.enabled false true
fission.processOriginNames false undefined
fission.processPrivateWindowSiteNames undefined false
fission.processSiteNames undefined false
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.egl.prefer-gles.enabled undefined false
gfx.swap-interval.egl undefined false
gfx.swap-interval.glx undefined true
image.mem.allow_locking_in_content_processes true undefined
javascript.options.experimental.enable_change_array_by_copy undefined false
javascript.options.wasm_caching undefined true
javascript.options.wasm_simd_wormhole undefined false
layers.enable-tiles false undefined
layers.force-synchronous-resize true false
layers.iosurfaceimage.use-nv12 undefined true
layers.tile-height 512 undefined
layers.tile-width 512 undefined
layers.tiles.adjust true undefined
layout.css.page-size.enabled false true
layout.css.prefers-color-scheme.content-override 2 3
layout.dynamic-reflow-roots.enabled false true
media.gmp-manager.checkContentSignature undefined true
media.mp4.sniff_iso_brand undefined true
media.peerconnection.mtransport_process false true
network.cache.frecency_array_check_enabled false true
network.cookie.move.interval_sec 10 0
network.http.referer.disallowCrossSiteRelaxingDefault false true
network.jar.record_failure_reason false true
network.process.enabled false true
network.proxy.parse_pac_on_socket_process undefined false
network.trr.padding undefined true
network.trr.padding.length undefined 128
network.url.max-length undefined 33554432
nglayout.debug.disable_xul_cache undefined false
privacy.annotate_channels.strict_list.enabled false true
privacy.file_unique_origin true undefined
privacy.globalprivacycontrol.enabled undefined false
privacy.globalprivacycontrol.functionality.enabled undefined false
privacy.restrict3rdpartystorage.rollout.preferences.TCPToggleInStandard undefined false
privacy.restrict3rdpartystorage.rollout.preferences.learnMoreURLSuffix undefined total-cookie-protection
security.disallow_non_local_systemprincipal_in_tests undefined false
security.disallow_privileged_https_stylesheet_loads undefined true
security.intermediate_preloading_healer.enabled false true
security.remote_settings.crlite_filters.enabled false true
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
toolkit.telemetry.enabled false true
widget.gtk.follow-firefox-theme true undefined