This is difference between the default preference of Firefox 106.0 beta 5 and one of 105.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 105.0.1Firefox 106.0 beta 5
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 false true
browser.cache.offline.enable true false
browser.contentblocking.features.strict tp,tpPrivate,cm,fp,stp,lvl2,rp,rpTop,ocsp,qps,qpsPBM tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,rpTop,ocsp,qps,qpsPBM
browser.dataFeatureRecommendations.enabled undefined false
browser.firefox-view.feature-tour {"message":"FIREFOX_VIEW_FEATURE_TOUR","screen":"","complete":true} {"message":"FIREFOX_VIEW_FEATURE_TOUR","screen":"FIREFOX_VIEW_SPOTLIGHT","complete":false}
browser.firefox-view.view-count undefined 0
browser.newtabpage.activity-stream.discoverystream.hideDescriptionsRegions undefined
browser.newtabpage.activity-stream.discoverystream.saveToPocketCardRegions undefined
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.privacySegmentation.enabled false undefined
browser.privacySegmentation.preferences.learnMoreURLSuffix data-features undefined
browser.privacySegmentation.windowSeparation.enabled false undefined
browser.privateWindowSeparation.enabled undefined true
browser.privatebrowsing.enable-new-indicator false true
browser.privatebrowsing.enable-new-logo false true
browser.promo.pin.enabled false true
browser.search.separatePrivateDefault false true
browser.startup.upgradeDialog.enabled false true
browser.swipe.navigation-icon-move-distance 0 100
browser.tabs.firefox-view false true
browser.tabs.firefox-view.logLevel undefined Warn
browser.tabs.tabmanager.enabled false true
browser.theme.colorway-closet false true
browser.theme.dark-private-windows false true
browser.urlbar.quickactions.showInZeroPrefix undefined true
browser.urlbar.quickactions.showPrefs undefined true
browser.urlbar.shortcuts.quickactions undefined true
browser.urlbar.showSearchTerms undefined false
browser.urlbar.suggest.quickactions undefined true
cookiebanners.bannerClicking.enabled undefined false
cookiebanners.bannerClicking.logLevel undefined Error
cookiebanners.bannerClicking.testing undefined false
cookiebanners.bannerClicking.timeout undefined 3000
cookiebanners.listService.testRules undefined []
cookiebanners.service.enableGlobalRules undefined false
devtools.toolbox.alwaysOnTop undefined true
devtools.toolbox.sideEnabled true undefined
docshell.shistory.bfcache.ship_allow_beforeunload_listeners false true
dom.caches.hide_in_pbmode.enabled false undefined
dom.document.edit_command.contentReadOnly.enabled true false
dom.document.edit_command.insertBrOnReturn.enabled true false
dom.focus.fixup undefined false
dom.image-lazy-loading.root-margin.bottom 300.0 600.0
dom.image-lazy-loading.root-margin.left 300.0 600.0
dom.image-lazy-loading.root-margin.right 300.0 600.0
dom.image-lazy-loading.root-margin.top 300.0 600.0
dom.indexedDB.hide_in_pbmode.enabled false undefined
dom.mozCurrentTransform.enabled true false
dom.picture_source_dimension_attributes.enabled undefined false
dom.resize_observer.last_reported_size_invalid undefined true
dom.security.credentialmanagement.identity.enabled undefined false
dom.security.credentialmanagement.identity.wait_for_timeout undefined true
dom.serviceWorkers.hide_in_pbmode.enabled true undefined
dom.sitepermsaddon-provider.enabled undefined false
dom.text-recognition.enabled false true
dom.webidl.crosscontext_hasinstance.enabled true false
dom.webmidi.enabled false true
extensions.InstallTrigger.enabled true false
extensions.eventPages.enabled false true
extensions.formautofill.creditCards.heuristics.nameExpirySection.enabled undefined false
extensions.formautofill.creditCards.heuristics.numberOnly.confidenceThreshold undefined 0.5
extensions.manifestV2.actionsPopupURLRestricted undefined false
extensions.manifestV3.enabled false true
extensions.pocket.refresh.layout.enabled true undefined
extensions.webcompat-reporter.enabled false true
extensions.webextensions.base-content-security-policy script-src 'self' https://* http://localhost:* http://127.0.0.1:* moz-extension: blob: filesystem: 'unsafe-eval' 'wasm-unsafe-eval' 'unsafe-inline'; object-src 'self' moz-extension: blob: filesystem:; script-src 'self' https://* http://localhost:* http://127.0.0.1:* moz-extension: blob: filesystem: 'unsafe-eval' 'wasm-unsafe-eval' 'unsafe-inline';
extensions.webextensions.base-content-security-policy.v3 script-src 'self' 'wasm-unsafe-eval' http://localhost:* http://127.0.0.1:*; object-src 'self'; script-src 'self' 'wasm-unsafe-eval';
extensions.webextensions.default-content-security-policy script-src 'self' 'wasm-unsafe-eval'; object-src 'self'; script-src 'self' 'wasm-unsafe-eval';
extensions.webextensions.default-content-security-policy.v3 script-src 'self'; object-src 'self'; script-src 'self';
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.blithelper.lut-size.rgb.b undefined 15
gfx.blithelper.lut-size.rgb.g undefined 31
gfx.blithelper.lut-size.rgb.r undefined 31
gfx.blithelper.lut-size.ycbcr.cb undefined 15
gfx.blithelper.lut-size.ycbcr.cr undefined 31
gfx.blithelper.lut-size.ycbcr.y undefined 31
gfx.blithelper.precision undefined 2
html5.inert.enabled false true
javascript.options.mem.gc_heap_growth_factor 40 50
layout.css.iframe-embedder-prefers-color-scheme.content.enabled undefined true
layout.css.prefers-color-scheme.content-override 3 2
layout.css.supports-selector.enabled true undefined
layout.css.webkit-line-clamp.block.enabled undefined false
layout.css.webkit-line-clamp.enabled true undefined
layout.dynamic-reflow-roots.enabled false true
layout.skip_ticks_while_page_suspended undefined true
mathml.deprecated_alignment_attributes.disabled true undefined
mathml.error_message_layout_for_invalid_markup.disabled undefined true
mathml.legacy_maction_and_semantics_implementations.disabled undefined true
mathml.mathvariant_styling_fallback.disabled undefined true
mathml.mfrac_bevelled_attribute.disabled true undefined
mathml.mfrac_linethickness_names.disabled true undefined
mathml.script_shift_attributes.disabled true undefined
media.navigator.mediadatadecoder_vpx_enabled false true
media.webrtc.capture.allow-iosurface undefined true
media.webrtc.platformencoder.sw_mft false true
network.cache.frecency_array_check_enabled false true
network.cookie.sameSite.laxByDefault false true
network.cookie.sameSite.noneRequiresSecure false true
network.jar.record_failure_reason false true
network.predictor.enable-prefetch false true
pdfjs.annotationEditorMode -1 0
privacy.annotate_channels.strict_list.enabled false true
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
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
services.sync.prefs.sync.browser.firefox-view.feature-tour undefined true
signon.showAutoCompleteOrigins true undefined
toolkit.telemetry.enabled false true
widget.disable-swipe-tracker true false