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I work on kubuntu 20.04 with plasma 5.18.8 desktop environment. I have a QtCurve-based custom application style, which I almost match with css for GTK apps. Firefox has to be an exception by itself! Not only that, but it changes my ability to customize its interface, from time to time and even changes access to such ability, on some updates.

My scrollbar customizations in userChrome.css and userContent.css do not work any more (other CSS changes still work, for menu/addressbar/tabbar/bookmarksbar orderint and tab styling). I had to resort to settings in user.js file, to get a 20px width scrollbar, suitable for my big screen, but... it gets very wide when I increase the focus, on some webpages and becomes very ugly! Furthermore, I cannot make sense of the proper use of "ui.themedScrollbar*" settings and the scrollbar and its slider result in the same color. These are my settings in user.js:

user_pref("widget.content.gtk-theme-override", "backwater"); user_pref("widget.non-native-theme.enabled", false); // Use GTK-3.0 gtk.css: set to false user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // Use userChrome.css & userContent.css: set to true user_pref("widget.gtk.alt-theme.scrollbar_active", true); user_pref("widget.non-native-theme.scrollbar.size.override", 20); // If nothing else works, fix scrollbar width to 20px user_pref("widget.non-native-theme.gtk.scrollbar.round-thumb", false); user_pref("widget.non-native-theme.gtk.scrollbar.thumb-size", 1.0); // originally 0.75 user_pref("widget.non-native-theme.gtk.scrollbar.allow-buttons", true); // it was true, anyway... user_pref("layout.css.cached-scrollbar-styles.enabled", false); user_pref("layout.css.color-mix.enabled", true); user_pref("widget.non-native-theme.scrollbar.style", 4); // wide scrollbar theme: set to 4 user_pref("ui.themedScrollbar", "#bad1f5"); user_pref("ui.themedScrollbarInactive", "#668cc4"); user_pref("ui.themedScrollbarThumb", "#e4e4e4"); user_pref("ui.themedScrollbarThumbHover", "#e4e4e4"); user_pref("ui.themedScrollbarThumbActive", "#668cc4"); user_pref("ui.themedScrollbarThumbInactive", "#bad1f5"); user_pref("browser.dom.window.dump.enabled", false); user_pref("extensions.ui.sitepermission.hidden", false); user_pref("fission.experiment.max-origins.qualified", true);

Either with the "ui.themedScrollbar*" settings or without them (and cleared from the prefs.js file), the scrollbar and its slider result in the same color, unless I (tryingly) click on some place on the scrollbar outside its slider; then I can see the slider, _only_ for the duration of the mouse-down event (which causes up or down page-hight scrolling).

The default, very thin scrollbar, as well as my modified wide scrollbar with invisible slider are both useless to me! I have even tried fx-autoconfig (https://github.com/MrOtherGuy/fx-autoconfig) to make the scrollbar CSS work, but no result. At this point, I am considering switching to another browser, despite the trust I have to mozilla, for my data and privacy.

I cannot removed total adblock and especially the ad for total adblock. I tried to follow the instructions, but they do not bring up the menu that they are supposed to bring up. HELP

As from v100.0, Firefox allows users to "set their preferred color schemes for websites".

Ironically, this does not addresses complaints from users, including me, who wish for a consistent Light theme all across Firefox.

Even if "Web site appearance" is set as Light, the following still remain dark:

• Background of main drop-down menu (Containing "Sync and save data", "New tab", "Print", "Settings", etc)
• Background of right-click menu (Containing the refresh icon, "Save page as", "View page source", etc)
• Background of "Please enter primary password" menu
• Background of auto-filled user name and password menus
• Background of elements in a bookmark folder
• Background of Downloads menu
• Background of Print menu
• Background of "Clear all history" menu
• Background of "Find on this page" menu
• Background of "You are about to close X tabs" warning menu
• Colour of title bar for "About Mozilla Firefox" window, when the window is not currently active

Being able to set "browser.theme.toolbar-theme" permanently as 2 would fix all of the above, but users are still (Note: Since v96.0, when this complaint was raised) prevented from doing so. Why?

Each time Firefox updates, the email client changes to the outlook default. The last 2-3 updates, mailto does not appear on the file,settings,applications menu. Nor will it populate if I type it in. I have tried every instruction to no avail. I am a long-time firefox user, non-techie and it is discouraging when things disappear with each update lately. Would appreciate any suggestions. Thanks

Why why why why is FF forcing download of pdf files? It is a horrible problem for me.

Especially because I am a university prof and, in the classroom, constantly display (my own!) files from the course management system on the classroom devices. I DO NOT WANT MY FILES SAVED ONTO THE (PUBLIC) CLASSROOM DEVICE. Never mind multiple copies as it will download EACH AND EVERY TIME I open it.

I have been looking everywhere for a solution or a way to disable this feature, there seems to be no such option but I am seeing a lot of posts from people who object to this as much as I do.

After many many years of loyally using FF and a paid subscriber to some Mozilla services, I am afraid I am going to have to give up using FF is this isn't fixed NOW.

Hello Support:

My MacBookPRO OS was updated to Monterey 12.3.1 I lost my favored settings in Firefox. The Firefox settings loaded to default settings

. I would like to recover my Firefox settings. Is this possible? Is there a step by step "punch card" list to get the set back for the former state?

--Regards, Richard

I cannot find a way to display several tabs next to the search field on Android! For mobile phone as well as tablets the original '+' button seems to be removed!? How to open and add tabs on the top of the screen?? To quickly jump... It was possible in ALL OLD VERSIONS. Please advice. Thank you very much.

I just installed firefox on a linux machine, and spontaniously, I keep getting a message pop up toward the top of the screen saying: "To play videos, you may need to install the video codecs".

This occurs when I am not even trying to play videos. I can play youtube videos fine. I don't need to install anything. It normally occurs when I am checking my outlook email, but can happen at any time.

So my question is, how do I stop this message from coming up? Prefereably WITHOUT installing some codec that I do not currently need.

Another message that comes up is an offer to install an outlook extension to my browser, but this is triggered by opening outlook email. I have no need for this either, so it would be nice to get rid if this message popping up as well.

Thanks

Hello! I want to work with burp suit application but for work with it the foxy proxy need. when I turned on the foxy proxy it always gives me different kind of error messages such ass "The proxy server is refusing connections". I tried everything I could but to no avail.

Hi guys:

I use Firefox on a Mac (Big Sur OS), and all of a sudden when I updated to the latest Firefox version -- each time I click on Firefox it opens in a new window other than the one I'm working on which is **really** annoying! What can I do to prevent this? Is there some adjustment in preferences I'm not aware of? Please help!!

Thanks much,

Kelli

I was in two minds whether to post this i not as quite minor really, that said Thunderbird will be my default email client on several machines so may as well get Q's out of the way.

Changed the font size for emails and folder text which is spot on, the only other thing would be to have the title bars or column headers (subject, correspondent, date and so on) in bold as a quick glance makes them seem part of the emails.

This option is probably available similar to changing the font inside config file but I may not be searching for the right thing, 'headers' returns results for the actual message format.

On another note, in case this pops up later on, while dragging icons from the toolbar selection tray the 'delete' button didn't quite make it, the button is no longer in the tray (as an option) or on the menu ?

Many thanks all

Why is there no Multi-Account containers extension for Android? Honestly I think its an amazing extension for maintaining privacy, and I'd love to have that on my phone.

Hello. With version 100.0 came multi-language spellchecking. I would like to know how exactly does it work, please.

For instance, if I enable both English and French, will it simply virtually add the two dictionaries and use the resulting combined list of words? Or will it try to understand if a paragraph or sentence is English and mark non-English words in that paragraph/sentence as incorrect even if they are French?

I am obviously asking this because there is no detailed information at https://support.mozilla.org/en-US/kb/how-do-i-use-firefox-spell-checker.

Hello Why i cant choose Google.ch (Google switzerland) as my standard search engine? I need this search engine because its the only google search i can choose search within switzerland.

hi,

My firefox is downloading all the adobe files even though i have turned of the auto download option. Also whenever any pdf file i try, it gives me an option of open with or save file. I am trying open with & firefox still downloads that file to my system. Can anyone help

Before update when I clicked in PDF viewer toolbar download button it opened a screen to open with, right now it only download a file. I want it back. I have firefox as pdf viewer, but sometimes I need to open file with Acrobat DC, that's when I did click download button. It works on other computer like before, it is before firefox update.

I have been a "light theme" user for 15+ years. Since updating to 96.0 today, a dark mode spreading across Firefox has been forced onto me, including:

• New tab background
• Background of any tab waiting to load a page
• Google/Youtube background
• Settings/add-ons/password menu backgrounds
• Automatic username/password drop-down background
• Background of the little box that appears on the bottom-left (the one which shows the URL when you mouse over a link)

I am unhappy with this and wish to have my usual theme back. Can anyone please assist?

(In addition, there is some sort of white border around the current tab, which I do not like)

I wanted to adjust some system preferences after installing the new FF 100 OS. Found I can't, either by menu or by keyboard shortcut. How do I get my access back? Using Mac OS 10.13.6. Do I need to go back to previous FF 99 version?

Thank you Rob

Just installed Firefox 100 on Windows 7 Home Premium 64-bit, upgrading from Firefox 56(!). The new version properly imported my previous color settings for visited/unvisited links, and visited links do change to the correct color, but for some reason, they do not reset to the unvisited color after clearing all browsing history and reloading the page. The only way I can get them to reset to the unvisited color is to close/re-start Firefox. Any idea what's going on? Thanks for any info!