This is difference between the default preference of Firefox 104.0 beta 6 and one of 103.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 103.0.1Firefox 104.0 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/new?reason=manual-update https://www.mozilla.org/%LOCALE%/firefox/beta?reason=manual-update
apz.minimap.enabled false undefined
browser.browser.firefoxView.featureTour undefined default, default, true
browser.cache.offline.enable true false
browser.contentblocking.features.strict tp,tpPrivate,cm,fp,stp,lvl2,rp,rpTop,ocsp,qps tp,tpPrivate,cm,fp,stp,lvl2,rp,rpTop,ocsp,qps,qpsPBM
browser.fixup.alternate.enabled true false
browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","messageGroups":["cfr","aboutwelcome","infobar","spotlight","moments-page","pbNewtab"],"updateCycleInMs":3600000} {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","updateCycleInMs":3600000}
browser.newtabpage.activity-stream.discoverystream.engagementLabelEnabled false undefined
browser.newtabpage.activity-stream.discoverystream.lastCardMessage.enabled false undefined
browser.newtabpage.activity-stream.discoverystream.loadMore.enabled false undefined
browser.newtabpage.activity-stream.showRecentSaves undefined true
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.privacySegmentation.windowSeparation.enabled undefined false
browser.privatebrowsing.enable-new-indicator undefined false
browser.promo.pin.enabled undefined true
browser.safebrowsing.provider.mozilla.lists base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256 base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256
browser.sessionstore.collect_session_storage undefined true
browser.sessionstore.collect_zoom undefined true
browser.sessionstore.platform_collection undefined true
browser.snapshots.score.IsUsedRemoved -10 undefined
browser.snapshots.score.IsUserRemoved undefined -10
browser.tabs.remote.coep.credentialless undefined false
browser.urlbar.dnsResolveSingleWordsAfterSearch 1 0
canvas.hitregions.enabled false undefined
devtools.responsive.showUserAgentInput false true
docshell.shistory.bfcache.ship_allow_beforeunload_listeners false true
dom.caches.hide_in_pbmode.enabled undefined false
dom.fullscreen.modal false true
dom.image-lazy-loading.root-margin.bottom 300.0 100.0
dom.image-lazy-loading.root-margin.bottom.percentage false true
dom.image-lazy-loading.root-margin.left 300.0 100.0
dom.image-lazy-loading.root-margin.left.percentage false true
dom.image-lazy-loading.root-margin.right 300.0 100.0
dom.image-lazy-loading.root-margin.right.percentage false true
dom.image-lazy-loading.root-margin.top 300.0 100.0
dom.image-lazy-loading.root-margin.top.percentage false true
dom.indexedDB.hide_in_pbmode.enabled undefined false
dom.indexedDB.preprocessing undefined false
dom.indexedDB.storageOption.enabled false undefined
dom.indexedDB.testing undefined false
dom.mouse_event.region.enabled undefined false
dom.mozCurrentTransform.enabled true false
dom.origin-trials.coep-credentialless.state undefined 0
dom.serviceWorkers.hide_in_pbmode.enabled undefined true
dom.storage_access.forward_declared.enabled undefined false
dom.storage_access.forward_declared.lifetime undefined 900
dom.webidl.crosscontext_hasinstance.enabled true false
dom.webmidi.enabled false true
extensions.InstallTrigger.enabled true false
extensions.unifiedExtensions.enabled undefined false
extensions.webcompat-reporter.enabled false true
fission.enforceBlocklistedPrefsInSubprocesses.tmp false undefined
fission.omitBlocklistedPrefsInSubprocesses.tmp false undefined
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.canvas.accelerated.async-present undefined true
gfx.offscreencanvas.enabled false true
html5.inert.enabled false true
javascript.options.experimental.array_find_last false undefined
javascript.options.experimental.shadow_realms undefined false
javascript.options.wasm_simd true undefined
javascript.options.wasm_simd_wormhole undefined false
layers.low-precision-buffer false undefined
layers.low-precision-resolution 0.25 undefined
layout.css.animation-composition.enabled undefined false
layout.css.contain-intrinsic-size.enabled undefined false
layout.css.font-loading-api.workers.enabled undefined true
layout.css.outline-style-auto.enabled true undefined
layout.dynamic-reflow-roots.enabled false true
media.webrtc.platformencoder.sw_mft false true
network.cache.frecency_array_check_enabled false true
network.cookie.lifetimePolicy 0 undefined
network.cookie.sameSite.laxByDefault false true
network.cookie.sameSite.noneRequiresSecure false true
network.cookie.sameSite.schemeful false true
network.jar.record_failure_reason false true
network.predictor.enable-prefetch false true
nimbus.validation.enabled undefined true
pdfjs.annotationEditorEnabled false undefined
pdfjs.annotationEditorMode undefined 0
pdfjs.forcePageColors undefined false
privacy.annotate_channels.strict_list.enabled false true
privacy.partition.always_partition_third_party_non_cookie_storage undefined false
privacy.trackingprotection.emailtracking.data_collection.enabled undefined true
privacy.trackingprotection.emailtracking.enabled undefined false
privacy.trackingprotection.emailtracking.webapp.domains undefined mail.163.com,mail.aol.com,fastmail.com,webmail.gandi.net,mail.google.com,navigator-bs.gmx.com,app.hey.com,horde.org/apps/webmail,hushmail.com,icloud.com/mail,kolabnow.com,laposte.net/accueil,mail.lycos.com,mail.com/mail/,mail.ru,mailfence.com,outlook.live.com,email-postaci.com/,posteo.de,mail.protonmail.com,app.rackspace.com,mail.rediff.com,emailmg.ipage.com,runbox.com,mail.sina.com.cn,tutanota.com,mail.yahoo.com,mail.yandex.com,mail.zimbra.com,zoho.com/mail/
security.block_fileuri_script_with_wrong_mime false true
security.disallow_non_local_systemprincipal_in_tests undefined false
security.insecure_field_warning.contextual.enabled true undefined
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-seen.browser.newtabpage.activity-stream.section.highlights undefined false
services.sync.prefs.sync-seen.browser.newtabpage.activity-stream.section.highlights.includePocket undefined false
services.sync.prefs.sync-seen.general.autoScroll undefined false
services.sync.prefs.sync-seen.media.eme.enabled undefined false
services.sync.prefs.sync.network.cookie.lifetimePolicy true undefined
svg.embedder-prefers-color-scheme.content.enabled undefined false
toolkit.telemetry.enabled false true
urlclassifier.disallow_completions goog-downloadwhite-digest256,base-track-digest256,mozstd-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,goog-passwordwhite-proto,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256 goog-downloadwhite-digest256,base-track-digest256,mozstd-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,goog-passwordwhite-proto,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256
urlclassifier.features.emailtracking.allowlistTables undefined mozstd-trackwhite-digest256
urlclassifier.features.emailtracking.blocklistTables undefined base-email-track-digest256
urlclassifier.features.emailtracking.datacollection.allowlistTables undefined mozstd-trackwhite-digest256
urlclassifier.features.emailtracking.datacollection.blocklistTables undefined base-email-track-digest256,content-email-track-digest256
webgl.out-of-process.async-present undefined false
webgl.out-of-process.async-present.force-sync undefined true
webgl.use-canvas-render-thread undefined true
widget.disable-swipe-tracker true false
widget.non-native-theme.solid-outline-style undefined false