This is difference between the default preference of Firefox 94.0 beta 6 and one of 93.0. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 93.0Firefox 94.0 beta 6
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.nonwr.activate_all_scroll_frames false undefined
apz.nonwr.activate_all_scroll_frames_when_fission false undefined
browser.cache.offline.enable true false
browser.contentblocking.features.strict tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,ocsp
browser.download.enable_spam_prevention undefined false
browser.newtabpage.activity-stream.customizationMenu.enabled false undefined
browser.newtabpage.activity-stream.discoverystream.compactLayout.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.lastCardMessage.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.loadMore.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.newFooterSection.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.saveToPocketCard.enabled undefined false
browser.newtabpage.activity-stream.newNewtabExperience.enabled true undefined
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.privatebrowsing.infoBody undefined
browser.privatebrowsing.infoEnabled true undefined
browser.privatebrowsing.infoIcon undefined
browser.privatebrowsing.infoLinkText undefined
browser.privatebrowsing.infoLinkUrl undefined
browser.privatebrowsing.infoTitle undefined
browser.privatebrowsing.infoTitleEnabled true undefined
browser.privatebrowsing.promoEnabled true undefined
browser.privatebrowsing.promoLinkText undefined
browser.privatebrowsing.promoLinkUrl undefined
browser.privatebrowsing.promoTitle undefined
browser.privatebrowsing.promoTitleEnabled true undefined
browser.sessionstore.dom_form_limit undefined 2097152
browser.sessionstore.dom_form_max_limit undefined 52428800
browser.sessionstore.warnOnQuit false undefined
browser.startup.couldRestoreSession.count undefined 0
browser.tabs.warnOnClose true false
browser.warnOnQuitShortcut undefined true
devtools.every-frame-target.enabled undefined false
dom.forms.enterkeyhint 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.ipc.processCount.webIsolated 1 4
dom.shadowdom.delegatesFocus.enabled undefined true
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.webcompat-reporter.enabled false true
fission.highValue.coop.expiration undefined 2592000
fission.webContentIsolationStrategy undefined 1
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.layerscope.enabled false undefined
gfx.layerscope.port 23456 undefined
gfx.logging.painted-pixel-count.enabled false undefined
gfx.webrender.batched-texture-uploads undefined false
gfx.webrender.blob-tile-size undefined 256
gfx.webrender.debug.batched-texture-uploads false undefined
gfx.webrender.debug.draw-calls-for-texture-copy false undefined
gfx.webrender.draw-calls-for-texture-copy undefined false
gfx.webrender.enable-multithreading true undefined
gfx.webrender.multithreading undefined true
gfx.webrender.pbo-uploads undefined true
javascript.options.wasm_simd_wormhole undefined false
layers.acceleration.draw-fps.print-histogram false undefined
layers.acceleration.draw-fps.write-to-file false undefined
layers.bench.enabled false undefined
layers.bufferrotation.enabled true undefined
layers.componentalpha.enabled true undefined
layers.compositing-tiles.height 1024 undefined
layers.compositing-tiles.width 1024 undefined
layers.draw-bigimage-borders false undefined
layers.draw-borders false undefined
layers.draw-layer-info false undefined
layers.draw-tile-borders false undefined
layers.dump false undefined
layers.dump-client-layers false undefined
layers.dump-host-layers false undefined
layers.dump-texture false undefined
layers.effect.contrast 0.0 undefined
layers.effect.grayscale false undefined
layers.effect.invert false undefined
layers.flash-borders false undefined
layers.geometry.basic.enabled true undefined
layers.geometry.d3d11.enabled true undefined
layers.geometry.opengl.enabled true undefined
layers.low-precision-opacity 1.0 undefined
layers.max-active -1 undefined
layers.orientation.sync.timeout 0 undefined
layers.single-tile.enabled true undefined
layers.tile-initial-pool-size 50 undefined
layers.tile-pool-clear-timeout 5000 undefined
layers.tile-pool-shrink-timeout 50 undefined
layers.tile-pool-unused-size 10 undefined
layers.tiles.edge-padding false undefined
layers.tiles.fade-in.duration-ms 250 undefined
layers.tiles.fade-in.enabled false undefined
layers.tiles.retain-back-buffer true undefined
layers.transaction.warning-ms 200 undefined
layers.uniformity-info false undefined
layers.use-image-offscreen-surfaces true undefined
layout.animated-image-layers.enabled false undefined
layout.css.autofill.background undefined true
layout.css.font-visibility.level 3 undefined
layout.css.font-visibility.private undefined 3
layout.css.font-visibility.resistFingerprinting undefined 1
layout.css.font-visibility.standard undefined 3
layout.css.font-visibility.trackingprotection undefined 3
layout.css.grid-item-baxis-measurement.enabled undefined false
layout.css.scroll-linked-animations.enabled undefined false
layout.css.trig.enabled undefined false
layout.dynamic-reflow-roots.enabled false true
layout.paint_rects_separately true undefined
layout.smaller-painted-layers false undefined
media.decoder.skip_when_video_too_slow_ms undefined 2500
media.peerconnection.mtransport_process false true
network.cache.bug1708673 undefined false
network.cache.frecency_array_check_enabled false true
network.disable-localhost-when-offline undefined false
network.dns.http3_echconfig.enabled undefined false
network.http.altsvc.oe true false
network.http.clear_bogus_content_encoding undefined false
network.http.early_data_disable_on_error undefined true
network.http.early_data_max_error undefined 5
network.http.referer.disallowCrossSiteRelaxingDefault false true
network.jar.record_failure_reason false true
network.process.enabled false true
network.proxy.testing_localhost_is_secure_when_hijacked undefined false
network.send_ODA_to_content_directly false true
network.ssl_tokens_cache_enabled false true
network.trr.strict_native_fallback undefined false
privacy.annotate_channels.strict_list.enabled false true
privacy.clearsitedata.cache.enabled undefined false
privacy.partition.network_state.ocsp_cache undefined false
privacy.partition.network_state.ocsp_cache.pbmode undefined true
security.disallow_non_local_systemprincipal_in_tests undefined false
security.disallow_privileged_data_subdocuments_loads false 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
services.sync.prefs.sync.browser.sessionstore.warnOnQuit true undefined
signon.usernameOnlyForm.enabled false true
toolkit.aboutProcesses.profileDuration undefined 5
toolkit.aboutProcesses.showProfilerIcons undefined false
toolkit.sqlitejsm.loglevel undefined Error
toolkit.telemetry.enabled false true
widget.non-native-theme.always-high-contrast undefined false
widget.wayland-smooth-rendering 1 undefined
widget.wayland.async-clipboard.enabled false true
widget.wayland.multi-buffer-software-backend.enabled true undefined