Firefox supportforum

So I wanted to read PDFs trough firefox with a dark theme, looked up how to do so online, and people say to change the "about:config" option "pdfjs.viewerCssTheme" to "2" instead of "0", I did that, tried opening a PDF, nothing happend, it was still black text on white backgrounds. Tried closing firefox, reopened the pdf, nothing happened, still white backgrounds. Tried to check if it might have to do with that specific pdf file's config, created my own PDF file from a word document, tried to open it, still white backgrounds. Tried disabling extensions, (which I use four of, UBlock Origin, SponsporBlock, Return Youtube Dislike and Translate this page), didn't work. Tried enabling the option on my laptop, didn't work. Tried a bunch of other stuff and it still won't work. My Firefox version is 109 and I'm using Windows 10 I also don't want to use the console/file edit thing with grayscale(1) invertcolor(1) or whatever it was since it also reverses the colors of images instead of just the backgrounda nd text color.

Hello, when I'm on a website that could use my microphone or camera, I am not getting the prompt to ask for permission to use them. I have tried manualy giving the website permission in CTRL-I website settings. But that did not fix it. I have tried the same websites in google chrome, and my mic works then.

The latest update added persistent "More Tools" and "Extensions" icons on the top right of Firefox. Usually, by clicking "Customize Toolbar" I could remove any annoying icon that I don't want to persistently see, but it would seem that Firefox DISABLED the ability to remove these annoying icons. Please let us continue to customize our own toolbars and allow us to remove unwanted icons.

Well this happened after a Firefox Update with that i also suspect that using a User.js can aslo cause it would you like to look for the problem pls.

```js // /* You may copy+paste this file and use it as it is.

*
* If you make changes to your about:config while the program is running, the
* changes will be overwritten by the user.js when the application restarts.
*
* To make lasting changes to preferences, you will have to edit the user.js.
*/

/****************************************************************************

* Betterfox                                                                *
* "Ad meliora"                                                             *
* version: 107a1                                                           *
* url: https://github.com/yokoffing/Betterfox                              *

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/****************************************************************************

* SECTION: SECUREFOX                                                       *

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/** TRACKING PROTECTION ***/ user_pref("browser.contentblocking.category", "strict"); user_pref("privacy.trackingprotection.emailtracking.enabled", true); user_pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com"); user_pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com"); user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", true); user_pref("privacy.partition.always_partition_third_party_non_cookie_storage.exempt_sessionstorage", false); user_pref("beacon.enabled", false); user_pref("browser.uitour.enabled", false);

/** OCSP & CERTS / HPKP ***/ user_pref("security.OCSP.enabled", 0); user_pref("security.remote_settings.crlite_filters.enabled", true); user_pref("security.pki.crlite_mode", 2); user_pref("security.cert_pinning.enforcement_level", 2);

/** SSL / TLS ***/ user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true); user_pref("browser.xul.error_pages.expert_bad_cert", true); user_pref("security.tls.enable_0rtt_data", false);

/** FONTS***/ user_pref("layout.css.font-visibility.private", 1); user_pref("layout.css.font-visibility.trackingprotection", 1);

/** RFP ***/ user_pref("browser.startup.blankWindow", false); user_pref("browser.display.use_system_colors", false);

/** DISK AVOIDANCE ***/ user_pref("browser.cache.disk.enable", false); user_pref("browser.privatebrowsing.forceMediaMemoryCache", true); user_pref("browser.sessionstore.privacy_level", 2); user_pref("browser.helperApps.deleteTempFileOnExit", true); user_pref("browser.pagethumbnails.capturing_disabled", true);

/** SHUTDOWN & SANITIZING ***/ user_pref("privacy.history.custom", true);

/** SPECULATIVE CONNECTIONS ***/ user_pref("network.http.speculative-parallel-limit", 0); user_pref("network.dns.disablePrefetch", true); user_pref("browser.urlbar.speculativeConnect.enabled", false); user_pref("browser.places.speculativeConnect.enabled", false); user_pref("network.prefetch-next", false); user_pref("network.predictor.enabled", false); user_pref("network.predictor.enable-prefetch", false);

/** SEARCH / URL BAR ***/ user_pref("browser.search.separatePrivateDefault.ui.enabled", true); user_pref("browser.urlbar.update2.engineAliasRefresh", true); user_pref("browser.search.suggest.enabled", false); user_pref("browser.urlbar.suggest.quicksuggest.sponsored", false); user_pref("browser.urlbar.suggest.quicksuggest.nonsponsored", false); user_pref("network.IDN_show_punycode", true);

/** HTTPS-ONLY MODE ***/ user_pref("dom.security.https_only_mode", true); user_pref("dom.security.https_only_mode_error_page_user_suggestions", true);

/** DNS-over-HTTPS (DOH) ***/ user_pref("network.dns.skipTRR-when-parental-control-enabled", false);

/** PROXY / SOCKS / IPv6 ***/ user_pref("network.proxy.socks_remote_dns", true); user_pref("network.file.disable_unc_paths", true); user_pref("network.gio.supported-protocols", "");

/** PASSWORDS AND AUTOFILL user_pref("signon.formlessCapture.enabled", false); user_pref("signon.privateBrowsingCapture.enabled", false); user_pref("signon.autofillForms", false); user_pref("signon.rememberSignons", false); user_pref("editor.truncate_user_pastes", false); ***/

/** ADDRESS + CREDIT CARD MANAGER ***/ user_pref("extensions.formautofill.addresses.enabled", false); user_pref("extensions.formautofill.creditCards.enabled", false); user_pref("extensions.formautofill.heuristics.enabled", false); user_pref("browser.formfill.enable", false);

/** MIXED CONTENT + CROSS-SITE ***/ user_pref("network.auth.subresource-http-auth-allow", 1); user_pref("pdfjs.enableScripting", false); user_pref("extensions.postDownloadThirdPartyPrompt", false); user_pref("permissions.delegation.enabled", false);

/** HEADERS / REFERERS ***/ user_pref("network.http.referer.XOriginTrimmingPolicy", 2);

/** CONTAINERS ***/ user_pref("privacy.userContext.ui.enabled", true);

/** WEBRTC ***/ user_pref("media.peerconnection.ice.proxy_only_if_behind_proxy", true); user_pref("media.peerconnection.ice.default_address_only", true);

/** GOOGLE SAFE BROWSING ***/ user_pref("browser.safebrowsing.malware.enabled", false); user_pref("browser.safebrowsing.phishing.enabled", false); user_pref("browser.safebrowsing.downloads.enabled", false); user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); user_pref("browser.safebrowsing.blockedURIs.enabled", false);

/** MOZILLA ***/ user_pref("identity.fxaccounts.enabled", false); user_pref("browser.tabs.firefox-view", false); user_pref("dom.push.enabled", false); user_pref("permissions.default.desktop-notification", 2); user_pref("permissions.default.geo", 2); user_pref("geo.provider.network.url", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%"); user_pref("geo.provider.ms-windows-location", false); // WINDOWS user_pref("geo.provider.use_corelocation", false); // MAC user_pref("geo.provider.use_gpsd", false); // LINUX user_pref("geo.provider.use_geoclue", false); // LINUX user_pref("browser.region.update.enabled", false); user_pref("permissions.manager.defaultsUrl", ""); user_pref("webchannel.allowObject.urlWhitelist", "");

/** TELEMETRY ***/ user_pref("toolkit.telemetry.unified", false); user_pref("toolkit.telemetry.enabled", false); user_pref("toolkit.telemetry.server", "data:,"); user_pref("toolkit.telemetry.archive.enabled", false); user_pref("toolkit.telemetry.newProfilePing.enabled", false); user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); user_pref("toolkit.telemetry.updatePing.enabled", false); user_pref("toolkit.telemetry.bhrPing.enabled", false); user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); user_pref("toolkit.telemetry.coverage.opt-out", true); user_pref("toolkit.coverage.opt-out", true); user_pref("datareporting.healthreport.uploadEnabled", false); user_pref("datareporting.policy.dataSubmissionEnabled", false); user_pref("app.shield.optoutstudies.enabled", false); user_pref("browser.discovery.enabled", false); user_pref("breakpad.reportURL", ""); user_pref("browser.tabs.crashReporting.sendReport", false); user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); user_pref("captivedetect.canonicalURL", ""); user_pref("network.captive-portal-service.enabled", false); user_pref("network.connectivity-service.enabled", false); user_pref("default-browser-agent.enabled", false); user_pref("app.normandy.enabled", false); user_pref("app.normandy.api_url", ""); user_pref("browser.ping-centre.telemetry", false); user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false); user_pref("browser.newtabpage.activity-stream.telemetry", false);

/****************************************************************************

* SECTION: PESKYFOX                                                        *

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/** MOZILLA UI ***/ user_pref("layout.css.prefers-color-scheme.content-override", 2); user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); user_pref("app.update.suppressPrompts", true); user_pref("accessibility.force_disabled", 1); user_pref("browser.compactmode.show", true); user_pref("browser.privatebrowsing.vpnpromourl", ""); user_pref("extensions.getAddons.showPane", false); user_pref("extensions.htmlaboutaddons.recommendations.enabled", false); user_pref("browser.shell.checkDefaultBrowser", false); user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false); user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false); user_pref("browser.preferences.moreFromMozilla", false); user_pref("browser.tabs.tabmanager.enabled", false); user_pref("browser.aboutwelcome.enabled", false); user_pref("findbar.highlightAll", true); user_pref("middlemouse.contentLoadURL", false); user_pref("browser.privatebrowsing.enable-new-indicator", false);

/** FULLSCREEN ***/ user_pref("full-screen-api.transition-duration.enter", "0 0"); user_pref("full-screen-api.transition-duration.leave", "0 0"); user_pref("full-screen-api.warning.delay", 0); user_pref("full-screen-api.warning.timeout", 0);

/** URL BAR ***/ user_pref("browser.urlbar.suggest.engines", false); user_pref("browser.urlbar.suggest.topsites", false); user_pref("browser.urlbar.suggest.calculator", true); user_pref("browser.urlbar.unitConversion.enabled", true);

/** NEW TAB PAGE ***/ user_pref("browser.newtabpage.activity-stream.feeds.topsites", false); user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);

/*** POCKET ***/ user_pref("extensions.pocket.enabled", false);

/** DOWNLOADS ***/ user_pref("browser.download.useDownloadDir", false); user_pref("browser.download.alwaysOpenPanel", false); user_pref("browser.download.manager.addToRecentDocs", false); user_pref("browser.download.always_ask_before_handling_new_types", true);

/** PDF ***/ user_pref("browser.download.open_pdf_attachments_inline", true);

/** TAB BEHAVIOR ***/ user_pref("browser.link.open_newwindow.restriction", 0); user_pref("dom.disable_window_move_resize", true); user_pref("browser.tabs.loadBookmarksInTabs", true); user_pref("browser.bookmarks.openInTabClosesMenu", false); user_pref("clipboard.plainTextOnly", true); user_pref("dom.popup_allowed_events", "click dblclick"); user_pref("layout.css.has-selector.enabled", true);

/****************************************************************************

* SECTION: FASTFOX                                                         *

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user_pref("nglayout.initialpaint.delay", 0); user_pref("nglayout.initialpaint.delay_in_oopif", 0); user_pref("browser.startup.preXulSkeletonUI", false);

/** EXPERIMENTAL ***/ user_pref("layout.css.grid-template-masonry-value.enabled", true); user_pref("dom.enable_web_task_scheduling", true); user_pref("layout.css.animation-composition.enabled", true);

/** NETWORK ***/ user_pref("network.ssl_tokens_cache_capacity", 32768); user_pref("network.dnsCacheEntries", 20000); user_pref("network.dnsCacheExpiration", 3600); user_pref("network.dnsCacheExpirationGracePeriod", 240); user_pref("network.buffer.cache.size", 262144); user_pref("network.buffer.cache.count", 128);

/** GFX ***/ user_pref("gfx.webrender.all", true); user_pref("gfx.webrender.precache-shaders", true); user_pref("gfx.webrender.compositor", true); user_pref("gfx.canvas.accelerated", true); user_pref("gfx.canvas.accelerated.cache-items", 32768); user_pref("gfx.canvas.accelerated.cache-size", 4096); user_pref("gfx.content.skia-font-cache-size", 80); user_pref("image.cache.size", 10485760); user_pref("image.mem.decode_bytes_at_a_time", 131072); user_pref("image.mem.shared.unmap.min_expiration_ms", 120000); user_pref("layers.gpu-process.enabled", true); user_pref("media.memory_cache_max_size", 1048576); user_pref("media.memory_caches_combined_limit_kb", 2560000); user_pref("media.cache_size", 2048000); user_pref("media.cache_readahead_limit", 9000); user_pref("media.cache_resume_threshold", 6000);

/** CACHE ***/ user_pref("browser.cache.memory.max_entry_size", 153600);

/****************************************************************************

* SECTION: SMOOTHFOX                                                       *

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// see https://github.com/yokoffing/Betterfox/blob/master/Smoothfox.js // Enter your scrolling prefs below this line: // recommended for 60hz displays user_pref("general.smoothScroll", true); // DEFAULT user_pref("mousewheel.default.delta_multiplier_y", 275); // 250-500 /****************************************************************************

* START: MY OVERRIDES                                                      *

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// Enter your personal prefs below this line:

/****************************************************************************

* END: BETTERFOX                                                           *

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```

All of a sudden when I press F6, it starts a Google search (see image) instead of just focusing the address bar. This is rather annoying because I use F6 all the time to go to a different page (e.g. type "mail" and then follow the autocomplete to mail.google.com) and that doesn't work if it wants search google for mail instead.

How do I revert this to its normal behaviour?

Current situation: I have 2 monitors. I have the option of auto hide taskbar in desktop mode turned on. On the primary monitor, when I maximise firefox window( not full screen, the button between close and minimise, looking like a square), and hover my cursor towards the bottom, my taskbar doesn't unhide. However when I unminimise( clicking the middle button on the top right again), the taskbar unhides correctly. Also to note, my secondary monitor works completely fine ie, when firefox is maximised I can unhide taskbar on hovering near the bottom.

I have a question regarding syncing. Is there a way to remotely remove all synced information from Firefox on a particular PC without actually accessing it? For example, if I sync my home PC Firefox with my laptop or my work PC. Then, one day, for some reason I no longer have access to my work PC, and all of my sensitive information is there. Or if I lose my laptop, or if it is stolen... Is it possible to remove all sensitive information from a remote synced PC? Alternatively, is there a way to remove all synced information every time I close the browser? This way I can remove a particular PC in my Firefox account and once the browser is restarted at the remote location, the data will no longer be pulled and synced. Can this be done? Thanks in advance!

The free version allows for 5 masks. Is that 5 lifetime masks or 5 active masks? Example: If I set up 2 masks I have 3 remaining. If I delete one of the set up masks do I now have 4 remaining or have I still used up a mask even though it was deleted giving me 3 remaining? Thanks

i cannot print any web page from Firefox. The print option only offers me the option to save as PDF. Firefox is not detecting either my Brother laser printer or my Epson inkjet printer. if i use the print using system dialogue option fire fox shows a printer screen which has a simple entry of line prntr. If that is selected nothing at all happens. Clearly Firefox cannot detect my printers. If I save the web pages to a PDF file then open that file I can then get the normal system printing options and print the page. But all that does is clutter up my file system with files I will only ever use once. This proves the problem is clearly in Firefox and in its inability to detect system printers. I have tried all the suggestions from the help screens to no avail. Is there any other means of sorting this print problem.

Hello, The controls in Settings to choose how Firefox updates have disappeared from Settings / General? The "Firefox Updates" section is supposed to appear there, based on:

https://support.mozilla.org/en-US/kb/enable-background-updates-firefox-windows https://support.mozilla.org/en-US/kb/firefox-options-preferences-and-settings?as=u&utm_source=inproduct#search

This is on V109. I really need to be able to choose when an update goes in, Python / Jupyter applications I have running on Firefox can cost me hours of time to re-run if Firefox goes in and restarts itself when it wants to. I used to be able to control this. Has it really been removed, or is somewhere else and the docs not updated yet? Thanks Neil

I'm trying to get rid of these blue selector things. Apologies that I don't know what they're called. They appear at random times and I cannot force them to appear. Just happens randomly it seems when some text is selected.

Can something in the about:config be toggled to disable this?

Thanks.

Hi,

I have maybe forty simple tab groups (I'm a teacher) and have set STG to automatically back up. But I have no idea how to restore my simple tab groups from these backups. FYI I have an HP Spectre 360 laptop.

Many thanks, Michelle

I recently had to factory reset my computer and had to download and sync my firefox account all over again. It's been a week and firefox is still syncing, none of my bookmarks, add-ons, history or top sites on the new tab are showing up. Thankfully, it appears that most of my passwords have been synced.

I've read some other threads for tips and can confirm that I don't have this account logged in to other devices and I don't have a vpn or proxy running. I am able to obtain the sync logs but I have no idea how to read it.

How can I make the bookmarks, add-ons, history and top sites sync faster?

In the past, going to Wikipedia in Firefox automatically opened a search box to type in a search term. However, with the recently updated Wikipedia interface, Firefox no long opens a search box, so the user must: (a) stop typing (b) grab a mouse (c) click on the magnifying glass icon just to enter a search term. To demonstrate this, please go to https://en.wikipedia.org/wiki/Main_Page and you will see there is no search box and you have to manually open the search box.

However, this works perfectly in Chrome. Going to https://en.wikipedia.org/wiki/Main_Page automatically opens a search field to easily type into.

Will Firefox be updated to allow immediate access to search field in Wiki? Please see attached .png file and thank you for listening! CW