This is difference between the default preference of Firefox 130.0 beta 6 and one of 129.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 129.0.1Firefox 130.0 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-desktop&utm_campaign=whatsnew https://www.mozilla.org/%LOCALE%/firefox/%VERSION%beta/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-desktop&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.overscroll.enabled false true
browser.backup.template.fallback-download.aurora undefined https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#developer
browser.backup.template.fallback-download.beta undefined https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#beta
browser.backup.template.fallback-download.esr undefined https://www.mozilla.org/firefox/enterprise/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#download
browser.backup.template.fallback-download.nightly undefined https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#nightly
browser.backup.template.fallback-download.release undefined https://www.mozilla.org/firefox/download/thanks/?s=direct&utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control
browser.ml.chat.prompt.prefix I’m on page "%tabTitle%" with "%selection|12000%" selected. {"l10nId":"genai-prompt-prefix-selection"}
browser.ml.chat.prompts.0 {"label":"Summarize","value":"Please summarize the selection using precise and concise language. Use headers and bulleted lists in the summary, to make it scannable. Maintain the meaning and factual accuracy.","id":"summarize"} {"id":"summarize","l10nId":"genai-prompts-summarize"}
browser.ml.chat.prompts.1 {"label":"Simplify Language","value":"Please rewrite the selection in plain, clear language suitable for a general audience without specialized knowledge. Use all of the following tactics: simple vocabulary; short sentences; active voice; headers and bulleted lists for scannability. Maintain meaning and factual accuracy.","id":"simplify"} {"id":"simplify","l10nId":"genai-prompts-simplify"}
browser.ml.chat.prompts.2 {"label":"Quiz Me","value":"Please quiz me on this selection. Ask me a variety of types of questions, for example multiple choice, true or false, and short answer. Wait for my response before moving on to the next question.","id":"quiz","targeting":"!provider|regExpMatch('gemini')"} {"id":"quiz","l10nId":"genai-prompts-quiz","targeting":"!provider|regExpMatch('gemini')"}
browser.ml.chat.prompts.3 undefined {"id":"explain","l10nId":"genai-prompts-explain","targeting":"channel=='nightly'"}
browser.ml.chat.shortcuts undefined true
browser.ml.chat.shortcuts.custom undefined false
browser.ml.chat.shortcuts.longPress undefined 60000
browser.ml.modelCacheMaxSizeBytes undefined 1073741824
browser.newtabpage.activity-stream.discoverystream.merino-feed-experiment undefined false
browser.newtabpage.activity-stream.discoverystream.merino-provider.enabled false true
browser.newtabpage.activity-stream.discoverystream.region-weather-config US,CA
browser.newtabpage.activity-stream.discoverystream.spocs.startupCache.enabled undefined true
browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.locale-thumbs-config undefined en-US, en-GB, en-CA
browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.region-thumbs-config undefined US, CA
browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.searchTopsitesCompact false true
browser.newtabpage.activity-stream.discoverystream.topicLabels.enabled undefined true
browser.newtabpage.activity-stream.discoverystream.topicSelection.hasBeenUpdatedPreviously undefined false
browser.newtabpage.activity-stream.discoverystream.topicSelection.locale-topics-config undefined en-US, en-GB, en-CA
browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.displayCount undefined 0
browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.displayTimeout undefined 0
browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.enabled undefined true
browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.lastDisplayed undefined
browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.maybeDisplay undefined true
browser.newtabpage.activity-stream.discoverystream.topicSelection.region-topics-config undefined US, CA
browser.newtabpage.activity-stream.discoverystream.topicSelection.selectedTopics undefined
browser.newtabpage.activity-stream.discoverystream.topicSelection.suggestedTopics undefined business, arts, government
browser.newtabpage.activity-stream.discoverystream.topicSelection.topics undefined business, arts, food, health, finance, government, sports, tech, travel, education, society
browser.newtabpage.activity-stream.newtabWallpapers.enabled false true
browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled false true
browser.newtabpage.activity-stream.support.url undefined https://support.mozilla.org/1/firefox/130.0/Linux/en-US/new-tab
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.preferences.experimental false true
browser.preferences.search true undefined
browser.search.widget.inNavBar false undefined
browser.sessionstore.log.appender.file.logOnSuccess false true
browser.sessionstore.loglevel Warn Debug
browser.urlbar.fakespot.featureGate undefined false
browser.urlbar.fakespot.minKeywordLength undefined 4
browser.urlbar.fakespot.suggestedIndex undefined -1
browser.urlbar.showSearchTerms.featureGate false true
browser.urlbar.suggest.fakespot undefined true
cookiebanners.ui.desktop.enabled false true
dom.details_group.enabled undefined true
dom.document.edit_command.contentReadOnly.enabled true false
dom.document.edit_command.insertBrOnReturn.enabled true false
dom.event.keypress.key.allow_lone_surrogate true false
dom.events.mouse-pointer-boundary.keep-enter-targets-after-over-target-removed false true
dom.forms.always_allow_key_and_focus_events.enabled false true
dom.forms.fieldset_disable_only_descendants.enabled false true
dom.input.number_and_range_modified_by_mousewheel undefined false
dom.ipc.processCount.inference undefined 1
dom.media.webcodecs.enabled false true
dom.media.webcodecs.image-decoder.enabled undefined false
dom.navigation.webidl.enabled undefined false
dom.popup.experimental undefined false
dom.script_loader.navigation_cache undefined false
dom.security.credentialmanagement.chooser.testing.enabled undefined false
dom.w3c_pointer_events.dispatch_click_as_pointer_event true undefined
dom.webnotifications.privateBrowsing.enableDespiteLimitations false undefined
dom.webnotifications.privateBrowsing.enabled undefined true
extensions.InstallTrigger.enabled true false
extensions.webcompat-reporter.enabled false true
fission.enforceBlocklistedPrefsInSubprocesses false true
gfx.canvas.remote.use-draw-image-fast-path-d3d undefined false
gfx.webrender.frame-builder-thread-local-arena undefined false
gfx.webrender.scene-builder-thread-local-arena undefined false
gfx.webrender.worker-thread-local-arena undefined true
identity.fxaccounts.commands.remoteTabManagement.enabled false true
intl.hyphenate-capitalized.af undefined true
intl.hyphenate-capitalized.nl undefined true
intl.hyphenation-alias.cs-* undefined cs
intl.hyphenation-alias.sk undefined cs
intl.hyphenation-alias.sk-* undefined cs
javascript.options.mem.gc_generational undefined true
javascript.options.use_fdlibm_for_sin_cos_tan false true
javascript.options.wasm_exnref false true
javascript.options.wasm_experimental_inline_depth_limit undefined 2
javascript.options.wasm_experimental_inline_size_limit undefined 256
layout.css.content-visibility.enabled true undefined
layout.css.letter-spacing.model 0 2
layout.css.stretch-size-keyword.enabled undefined false
layout.css.webkit-fill-available.enabled undefined false
layout.dynamic-reflow-roots.enabled false true
layout.overflow-underflow.content.enabled true false
media.ffmpeg.encoder.quantizer-max undefined 35
media.ffmpeg.encoder.quantizer-min undefined 10
media.peerconnection.sdp.quirk.duplicate_fingerprint.allowlist undefined
media.rdd-theora.enabled true undefined
media.rvfc.enabled undefined false
media.theora.enabled true undefined
media.videocontrols.picture-in-picture.enable-when-switching-tabs.enabled undefined false
network.auth.use_redirect_for_retries false true
network.cookie.chips.partitionLimitEnabled false true
network.http.http3.retry_different_ip_family false true
network.http.http3.use_nspr_for_io undefined true
network.jar.record_failure_reason false true
network.parental_controls_cached_state undefined false
network.predictor.enable-prefetch false true
network.protocol-handler.external.news true undefined
network.protocol-handler.external.nntp true undefined
network.protocol-handler.external.snews true undefined
network.protocol-handler.warn-external.news false undefined
network.protocol-handler.warn-external.nntp false undefined
network.protocol-handler.warn-external.snews false undefined
network.send_OnDataFinished.cssLoader false true
pdfjs.altTextLearnMoreUrl undefined https://support.mozilla.org/1/firefox/%VERSION%/%OS%/%LOCALE%/pdf-alt-text
pdfjs.enableAltText undefined false
pdfjs.enableAltTextModelDownload undefined true
pdfjs.enableGuessAltText undefined true
pdfjs.enableHighlightFloatingButton false true
pdfjs.enableML false undefined
pdfjs.enableNewAltTextWhenAddingImage undefined true
pdfjs.enableStampEditor true undefined
pdfjs.enableUpdatedAddImage undefined false
plugins.rewrite_youtube_embeds true false
privacy.annotate_channels.strict_list.enabled false true
security.disallow_non_local_systemprincipal_in_tests undefined false
security.intermediate_preloading_healer.enabled true undefined
security.intermediate_preloading_healer.timer_interval_ms 300000 undefined
security.remote_settings.crlite_filters.enabled false true
security.ssl3.ecdhe_ecdsa_aes_128_sha true false
security.ssl3.ecdhe_ecdsa_aes_256_sha true false
security.tls.enable_certificate_compression_brotli false true
security.tls.enable_certificate_compression_zlib false true
security.tls.enable_certificate_compression_zstd false true
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
svg.nearestAndFarthestViewportElement.enabled true false
toolkit.telemetry.enabled false true
ui.new-webcompat-reporter.send-more-info-link false true
webgl.enable-egl-image undefined true