This is difference between the default preference of Firefox 118.0 beta 9 and one of 117.0.1. This diff table is generated with my small script firefox-prefjs-surveyer.

Preference difference
PrefFirefox 118.0.1Firefox 118.0 beta 9
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
browser.download.force_save_internally_handled_attachments undefined false
browser.newtabpage.activity-stream.feeds.section.topstories.options {"api_key_pref":"extensions.pocket.oAuthConsumerKey","hidden":true,"provider_icon":"chrome://global/skin/icons/pocket.svg","provider_name":"Pocket","read_more_endpoint":"https://getpocket.com/explore/trending?src=fx_new_tab","stories_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/global-recs?version=3&consumer_key=$apiKey&locale_lang=ja&feed_variant=default_spocs_off","stories_referrer":"https://getpocket.com/recommendations","topics_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/trending-topics?version=2&consumer_key=$apiKey&locale_lang=ja","show_spocs":false} {"api_key_pref":"extensions.pocket.oAuthConsumerKey","hidden":true,"provider_icon":"chrome://global/skin/icons/pocket.svg","provider_name":"Pocket","read_more_endpoint":"https://getpocket.com/explore/trending?src=fx_new_tab","stories_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/global-recs?version=3&consumer_key=$apiKey&locale_lang=en-US&feed_variant=default_spocs_off","stories_referrer":"https://getpocket.com/recommendations","topics_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/trending-topics?version=2&consumer_key=$apiKey&locale_lang=en-US","show_spocs":false}
browser.opaqueResponseBlocking false true
browser.opaqueResponseBlocking.javascriptValidator false true
browser.privatebrowsing.felt-privacy-v1 undefined false
browser.sessionstore.closedTabsFromClosedWindows undefined false
browser.shopping.experience2023.active undefined true
browser.shopping.experience2023.ads.enabled undefined true
browser.tabs.remote.desktopbehavior true undefined
browser.toolbars.bookmarks.showInPrivateBrowsing undefined false
browser.translations.automaticallyPopup false true
browser.translations.enable false true
browser.uitour.themeOrigin https://addons.mozilla.org/%LOCALE%/firefox/themes/ undefined
browser.urlbar.addons.featureGate false true
browser.urlbar.clipboard.featureGate undefined false
browser.urlbar.suggest.clipboard undefined true
browser.urlbar.suggest.trending undefined true
browser.urlbar.trimHttps undefined false
canvas.capturestream.enabled true undefined
canvas.filters.enabled true undefined
canvas.focusring.enabled true undefined
canvas.path.enabled true undefined
devtools.storage.test.forceLegacyActors false undefined
dom.event.keypress.dispatch_once_per_surrogate_pair undefined false
dom.event.keypress.key.allow_lone_surrogate undefined true
dom.forms.enterkeyhint true undefined
dom.fullscreen.modal true undefined
dom.image-lazy-loading.enabled true undefined
dom.ipc.cancel_content_js_when_navigating true undefined
dom.script_loader.external_scripts.utf8_parsing.enabled true undefined
dom.shadowdom.slot.assign.enabled true undefined
dom.storage_access.dont_grant_insecure_contexts undefined true
dom.textMetrics.emHeight.enabled false true
dom.worker.script_loader.utf8_parsing.enabled true undefined
extensions.browser_style_mv3.supported true false
extensions.webapi.enabled undefined true
extensions.webcompat-reporter.enabled false true
general.autoscroll.prevent_to_start.osKey false undefined
gfx.canvas.willreadfrequently.enabled undefined true
gfx.compositor.clearstate false undefined
intl.icu4x.segmenter.enabled undefined false
javascript.options.experimental.enable_array_from_async true undefined
javascript.options.experimental.enable_change_array_by_copy true undefined
javascript.options.mem.gc_parallel_marking_threshold_kb undefined 200000
layout.css.abs-sign.enabled false true
layout.css.exp.enabled false true
layout.css.font-size-adjust.basis.enabled true undefined
layout.css.font-visibility undefined 3
layout.css.font-visibility.private 3 undefined
layout.css.font-visibility.standard 3 undefined
layout.css.font-visibility.trackingprotection 3 undefined
layout.css.mod-rem.enabled false true
layout.css.motion-path-url.enabled undefined false
layout.css.nesting.enabled true undefined
layout.css.round.enabled false true
layout.css.scroll-snap.proximity-threshold 200 undefined
layout.css.transform-box-content-stroke.enabled undefined false
layout.css.zoom-transform-hack.enabled false undefined
mathml.error_message_layout_for_invalid_markup.disabled true undefined
mathml.legacy_maction_and_semantics_implementations.disabled true undefined
media.ffvpx.opus.enabled undefined true
media.ffvpx.vorbis.enabled undefined true
media.ffvpx.wav.enabled undefined true
media.getusermedia.residual_echo_enabled false undefined
media.gmp.use-minimal-xpcom undefined false
media.gmp.use-native-event-processing undefined true
media.webrtc.debug.aec_dump_max_size 4194304 undefined
mousewheel.with_win.action 1 undefined
mousewheel.with_win.action.override_x -1 undefined
mousewheel.with_win.delta_multiplier_x 100 undefined
mousewheel.with_win.delta_multiplier_y 100 undefined
mousewheel.with_win.delta_multiplier_z 100 undefined
network.http.reject_NULs_in_response_header_values undefined true
network.http.strict_response_status_line_parsing undefined true
network.preload true undefined
network.url.strict_data_url_base64_placement undefined true
permissions.delegation.enabled true undefined
print.cups.enum_dests_timeout_ms 150 undefined
print.use_simplify_page true undefined
privacy.bounceTrackingProtection.bounceTrackingActivationLifetimeSec undefined 3888000
privacy.bounceTrackingProtection.bounceTrackingGracePeriodSec undefined 3600
privacy.bounceTrackingProtection.bounceTrackingPurgeTimerPeriodSec undefined 3600
privacy.fingerprintingProtection.pbmode false true
privacy.partition.bloburl_per_partition_key undefined false
security.tls.grease_http3_enable undefined false
security.webauth.softtoken_counter 0 undefined
services.sync.prefs.sync.privacy.globalprivacycontrol.enabled undefined true
toolkit.shopping.ohttpConfigURL https://prod.ohttp-gateway.prod.webservices.mozgcp.net/ohttp-configs
toolkit.shopping.ohttpRelayURL https://mozilla-ohttp-fakespot.fastly-edge.com/
toolkit.shopping.useOHTTP false undefined
toolkit.telemetry.enabled false true
widget.swipe.page-size undefined 40.0
widget.swipe.pixel-size undefined 1100.0
widget.swipe.whole-page-pixel-size 40.0 undefined
widget.wayland.fractional-scale.enabled undefined false
widget.wayland.fractional_buffer_scale 0.0 undefined