This is difference between the default preference of Firefox 113.0 beta 3 and one of 112.0. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 113.0Firefox 113.0 beta 3
accessibility.cache.enabled false true
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.scrollthumb.recalc undefined false
browser.aboutwelcome.skipFocus true undefined
browser.bookmarks.editDialog.delayedApply.enabled false true
browser.cache.offline.enable true false
browser.migrate.chrome.history.maxAgeInDays 180 undefined
browser.migrate.content-modal.about-welcome-behavior undefined default
browser.migrate.history.maxAgeInDays undefined 180
browser.migrate.interactions.bookmarks undefined false
browser.migrate.interactions.history undefined false
browser.migrate.interactions.passwords undefined false
browser.migrate.preferences-entrypoint.enabled undefined true
browser.newtabpage.activity-stream.telemetry.ut.events false true
browser.opaqueResponseBlocking false true
browser.opaqueResponseBlocking.javascriptValidator false true
browser.ssl_override_behavior 2 undefined
browser.translations.autoTranslate undefined false
browser.translations.simulateUnsupportedEngine undefined false
browser.urlbar.bestMatch.blockingEnabled false true
browser.urlbar.quickactions.enabled undefined true
browser.urlbar.quickactions.showPrefs undefined true
browser.urlbar.quicksuggest.blockingEnabled false true
browser.urlbar.resultMenu false true
browser.urlbar.shortcuts.quickactions undefined true
browser.urlbar.showSearchTerms.featureGate false true
browser.urlbar.suggest.quickactions undefined true
cookiebanners.ui.desktop.enabled false true
devtools.debugger.features.javascript-tracing undefined false
devtools.debugger.features.outline true undefined
devtools.debugger.javascript-tracing-log-method undefined console
devtools.inspector.simple-highlighters-reduced-motion undefined false
docshell.shistory.bfcache.ship_allow_beforeunload_listeners false true
dom.compression_streams.enabled undefined true
dom.document.edit_command.contentReadOnly.enabled true false
dom.document.edit_command.insertBrOnReturn.enabled true false
dom.event.wheel-event-groups.enabled undefined false
dom.forms.always_allow_key_and_focus_events.enabled undefined false
dom.media.mozPreservesPitch.enabled undefined false
dom.mozImageSmoothingEnabled.enabled undefined false
dom.mozTextStyle.enabled false undefined
dom.webgpu.wgpu-backend undefined
dom.workers.importScripts.enforceStrictMimeType undefined false
editor.join_split_direction.compatible_with_the_other_browsers false true
extensions.InstallTrigger.enabled true false
extensions.formautofill.addresses.capture.v2.enabled undefined false
extensions.pocket.bffApi undefined firefox-api-proxy.cdn.mozilla.net
extensions.pocket.bffRecentSaves undefined true
extensions.pocket.oAuthConsumerKeyBff undefined 94110-6d5ff7a89d72c869766af0e0
extensions.webcompat-reporter.enabled false true
fission.enforceBlocklistedPrefsInSubprocesses false true
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.color_management.rec2020_gamma_as_rec709 undefined true
gfx.color_management.rec709_gamma_as_srgb undefined true
image.avif.sequence.enabled false true
javascript.options.experimental.enable_array_from_async undefined false
layout.css.allow-mixed-page-sizes false true
layout.css.color-mix.color-spaces.enabled false true
layout.css.color-mix.enabled false true
layout.css.d-property.enabled true undefined
layout.css.forced-color-adjust.enabled false true
layout.css.more_color_4.enabled false true
layout.css.nth-child-of.enabled false true
layout.css.prefers-reduced-transparency.enabled undefined false
layout.dynamic-reflow-roots.enabled false true
layout.image.eager_broken_image_icon undefined false
media.cubeb.sandbox_v2 false undefined
media.ffmpeg.vaapi.force-surface-copy false undefined
media.ffmpeg.vaapi.force-surface-zero-copy undefined 2
media.getusermedia.camera.macavf.enabled false true
media.gmp.decoder.preferred undefined false
media.videocontrols.picture-in-picture.improved-video-controls.enabled false true
media.videocontrols.picture-in-picture.urlbar-button.enabled undefined false
media.webrtc.platformencoder.sw_mft false true
network.cache.frecency_array_check_enabled false true
network.cookie.sameSite.noneRequiresSecure false true
network.dns.force_use_https_rr undefined false
network.early-hints.enabled false true
network.early-hints.preconnect.enabled false true
network.early-hints.preconnect.max_connections undefined 0
network.http.windows-sso.container-enabled.0 undefined true
network.jar.record_failure_reason false true
network.predictor.enable-prefetch false true
network.trr.ping_timeout undefined 3000
print.save_as_pdf.use_page_rule_size_as_paper_size.enabled false true
privacy.annotate_channels.strict_list.enabled false true
privacy.annotate_channels.strict_list.pbmode.enabled false true
privacy.partition.network_state.ws_connection_queue true undefined
privacy.resistFingerprinting.testing.setTZtoUTC undefined false
privacy.resistFingerprintingLite undefined false
privacy.resistFingerprintingLite.overrides undefined
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
security.ssl3.ecdhe_ecdsa_aes_128_sha true false
security.ssl3.ecdhe_ecdsa_aes_256_sha true false
security.webauth.softtoken_counter undefined 0
security.webauth.webauthn_enable_android_fido2 undefined false
security.webauth.webauthn_testing_allow_direct_attestation undefined false
security.webauthn.ctap2 false true
services.sync.engine.bookmarks.validation.enabled undefined true
services.sync.engine.passwords.validation.enabled undefined true
snav.enabled false undefined
svg.nearestAndFarthestViewportElement.enabled true false
telemetry.fog.artifact_build undefined false
toolkit.telemetry.enabled false true
webgl.all-angle-options false undefined
webgl.forbid-hardware undefined false
webgl.forbid-software undefined true