This is difference between the default preference of Firefox 98.0 beta 3 and one of 97.0. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 97.0Firefox 98.0 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/new?reason=manual-update https://www.mozilla.org/%LOCALE%/firefox/beta?reason=manual-update
apz.gtk.kinetic_scroll.delta_mode undefined 0
apz.gtk.kinetic_scroll.page_delta_mode_multiplier undefined 1.0
apz.gtk.kinetic_scroll.pixel_delta_mode_multiplier undefined 40.0
browser.bookmarks.editDialog.delayedApply.enabled undefined false
browser.cache.offline.enable true false
browser.download.clearHistoryOnDelete undefined 0
browser.download.improvements_to_download_panel false true
browser.find.ignore_ruby_annotations undefined true
browser.history.collectWireframes undefined false
browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","messageGroups":["cfr","aboutwelcome","infobar","spotlight","moments-page"],"updateCycleInMs":3600000} {"id":"messaging-experiments","enabled":true,"type":"remote-experiments","messageGroups":["cfr","aboutwelcome","infobar","spotlight","moments-page","pbNewtab"],"updateCycleInMs":3600000}
browser.newtabpage.activity-stream.colorway-closet.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.fourCardLayout.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.hideCardBackground.enabled undefined false
browser.newtabpage.activity-stream.discoverystream.hybridLayout.enabled undefined false
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.places.speculativeConnect.enabled undefined true
browser.preferences.moreFromMozilla false true
browser.privacySegmentation.enabled undefined false
browser.privacySegmentation.preferences.learnMoreURLSuffix undefined data-features
browser.privacySegmentation.preferences.show undefined false
browser.search.official true undefined
browser.search.searchEngineRemoval undefined https://support.mozilla.org/1/firefox/%VERSION%/%OS%/%LOCALE%/search-engine-removal
browser.send_to_device_locales undefined de,en-GB,en-US,es-AR,es-CL,es-ES,es-MX,fr,id,pl,pt-BR,ru,zh-TW
browser.soft_reload.only_force_validate_top_level_document false true
browser.tabs.remote.serviceWorkerIsolationList undefined
browser.theme.dark-private-windows undefined false
browser.urlbar.bestMatch.enabled undefined true
devtools.custom-formatters undefined false
devtools.custom-formatters.enabled undefined false
devtools.inspector.compatibility.enabled false true
devtools.performance.new-panel-enabled false true
devtools.performance.recording.active-tab-view.enabled undefined false
devtools.popups.debug undefined false
dom.dialog_element.enabled false true
dom.event.wheelDelta.enabled true undefined
dom.fs.enabled undefined false
dom.image-lazy-loading.root-margin.bottom 300.0 500.0
dom.image-lazy-loading.root-margin.left 300.0 500.0
dom.image-lazy-loading.root-margin.right 300.0 500.0
dom.image-lazy-loading.root-margin.top 300.0 500.0
dom.select_popup_in_parent.enabled false undefined
dom.storage.snapshot_idle_timeout_ms undefined 5000
dom.storage.snapshot_peak_usage.gradual_preincrement undefined 4096
dom.storage.snapshot_peak_usage.initial_preincrement undefined 16384
dom.storage.snapshot_peak_usage.reduced_gradual_preincrement undefined 1024
dom.storage.snapshot_peak_usage.reduced_initial_preincrement undefined 4096
dom.streams.byte_streams.enabled undefined false
dom.streams.readable_stream_default_controller.enabled undefined false
dom.streams.readable_stream_default_reader.enabled undefined false
dom.streams.writable_streams.enabled undefined false
dom.testing.testutils.enabled undefined false
dom.webcomponents.formAssociatedCustomElement.enabled false true
dom.window.content.untrusted.enabled true false
dom.window.sidebar.enabled true false
dom.workers.requestAnimationFrame undefined false
extensions.webcompat-reporter.enabled false true
gecko.handlerService.defaultHandlersVersion chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.0.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.0.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.1.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.1.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.2.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.2.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.3.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.irc.3.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.0.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.0.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.1.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.1.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.2.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.2.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.3.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.ircs.3.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.0.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.0.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.1.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.1.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.2.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.2.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.3.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.mailto.3.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.0.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.0.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.1.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.1.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.2.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.2.uriTemplate chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.3.name chrome://browser-region/locale/region.properties undefined
gecko.handlerService.schemes.webcal.3.uriTemplate chrome://browser-region/locale/region.properties undefined
general.useragent.forceVersion100 undefined false
general.useragent.handledVersionExperimentEnrollment undefined false
general.utility-process.startup_timeout_ms undefined 5000
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.offscreencanvas.domain-allowlist undefined
gfx.offscreencanvas.domain-enabled undefined false
gfx.webrender.force-partial-present undefined false
gfx.will-change.ignore-opacity undefined false
intl.multilingual.liveReload undefined false
intl.multilingual.liveReloadBidirectional undefined false
javascript.options.wasm_caching false true
javascript.options.wasm_simd_avx undefined false
javascript.options.wasm_simd_wormhole undefined false
layout.css.hyphenate-character.enabled false true
layout.css.resizeobserver.enabled true undefined
layout.display-list.retain.sc undefined false
layout.dynamic-reflow-roots.enabled false true
layout.flexbox.item-final-reflow-optimization.enabled undefined true
layout.forms.input-type-show-password-button.enabled false undefined
layout.forms.reveal-password-button.enabled undefined false
layout.forms.reveal-password-context-menu.enabled undefined false
media.cubeb.sandbox_v2 undefined false
media.devices.unfocused.enabled undefined false
media.eme.max-throughput-ms 200 500
media.ffmpeg.customized-buffer-allocation undefined false
media.ffmpeg.dmabuf-textures.disabled false undefined
media.ffmpeg.vaapi-drm-display.enabled true undefined
media.gmp-manager.checkContentSignature undefined true
media.ondevicechange.fakeDeviceChangeEvent.enabled false undefined
media.peerconnection.mtransport_process false true
media.videocontrols.picture-in-picture.video-toggle.visibility-threshold 0.9 1.0
network.cache.frecency_array_check_enabled false true
network.cookie.sameSite.laxByDefault false true
network.cookie.sameSite.noneRequiresSecure false true
network.cookie.sameSite.schemeful false true
network.dns.use_https_rr_for_speculative_connection false undefined
network.http.http3.enable undefined true
network.http.http3.enabled true undefined
network.http.http3.priority undefined true
network.http.http3.priorization true undefined
network.http.http3.send_background_tabs_deprioritization undefined false
network.http.http3.send_background_tabs_depriorization false undefined
network.http.referer.disallowCrossSiteRelaxingDefault false true
network.jar.record_failure_reason false true
network.predictor.enable-prefetch false true
network.process.enabled false true
network.trr.blacklist-duration 60 undefined
network.trr.temp_blocklist_duration_sec undefined 60
privacy.annotate_channels.strict_list.enabled false true
security.disallow_non_local_systemprincipal_in_tests undefined false
security.intermediate_preloading_healer.enabled false true
security.pki.crlite_ct_merge_delay_seconds 100800 undefined
security.remote_settings.crlite_filters.enabled false true
security.sandbox.content.win32k-experiment.enrollmentStatus undefined 0
security.sandbox.content.win32k-experiment.startupEnrollmentStatus undefined 0
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
toolkit.telemetry.enabled false true
widget.gtk.alt-theme.dark true undefined
widget.use-xdg-desktop-portal.settings undefined 2
widget.wayland.async-clipboard.enabled true undefined
widget.wayland.async-data-transfer.enabled false undefined