Firefox-Hilfeforum

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'm struggling to get Firefox to use `http` instead of `https` when I'm doing development on my laptop. Playing with the `HTTPS-only` in the settings didn't make difference. With enable or not. I tried to add my `localhost` to exception list, but Firefox still tries to use `https.`

I understand the security concern from Firefox team, but if I'm trying to load by typing `http,` I would appreciate if Firefox gave me a benefit of doubt that I know what I'm doing. Maybe I could disable this feature temporarily. Why force `https` on `localhost`?

Please allow us some flexibility.

I'm using Ubuntu 18.04. Developer tools kept popping up so I went into about:config & set everything to false. Now an equally annoying tab keeps opening up asking to enable them. I don't just get this hitting F12. Just like before I disabled, this keeps popping up for seemingly no reason. Guess I'm accidentally doing something with the mouse. I don't have a clue how to use developer tools. Wish I could just wipe it out completely.

I would like to enable picture-in-picture without constantly having a popup for it anytime my cursor goes onto the video screen. You could just put a button somewhere out of the way. It's so annoying I have to just disable it, and that's not right. Nobody needs popups of any kind for anything ever. It's the same as an ad.

Mozilla Firefox for linux Mint 99.0.1 (64 bit) - mint-001

Using Outlook web, when viewing pdf documents, it displays strange symbols (incorrect font sets are probably used).

I point out that using Chrome the problem does not arise.

I also installed the microsoft fonts thinking it might solve the problem I attach illustrative image.

Best Regards. Salvatore

I use firefox since I go to college. When I got some problems, I try to check firefox use what to pick folder? I use Manjaro Plasma. I find chrominum use kdialog. But firefox looks not though both use gtk3 as UI

Firefox choose folder got wrong when use a USB HDD

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.

I installed an extension from a website(not from addons.mozilla.org) and found it a bit suspicious so after around using it for 1 minute immediately removed it... So will an extension be able to access root/admin permissions if it had some malicious script executed(I am using debian) or can extension access system files,modify,delete or install/download anything without the users' permission?

Thanks in advance AVC

Hello Firefox Support, I need help to upgrade the version of the security protocol that enables access to my NAS unit. Now the message;

"Secure Connection Failed An error occurred during a connection to 192.168.1.201. Peer using unsupported version of security protocol. Error code: SSL_ERROR_UNSUPPORTED_VERSION

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

This website might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox."

indicates I no longer can access my page until I find the remedy to this issue. Thank you in advance for cooperation and help with is matter.

Canonical transformed Ubuntu installation process from apt to snap. Unfortunately my FF 100 now is not able to load libetpksc11 module with message: module cannot be loaded.

Hello! I've been using Firefox as my daily driver web browser for at least a year, first on Windows and now more recently on Linux (specs below). The PC itself is the same, the only thing to change was the OS. Ever since moving to Linux, I've had this problem with crashing. I have two monitors and I will usually snap the browser to half of one screen while I do other things on the rest of my display space. However, most of the time when I try to drag the browser window off of its half of the screen, all of my Firefox windows crash, with an error message about not being able to send a crash report (see attached image). This has been happening with multiple browser versions, both the official repository release as well as the Flatpak. No other application has behaved like this.

System details: OS: Manjaro Linux x86_64 Kernel: 5.17.1-3-MANJARO x86_64 DE: Plasma 5.24.4 WM: KWin CPU: AMD Ryzen 5 1600X Memory: 15982.8 MiB GPU: AMD Radeon RX 6600 XT (amdgpu driver in use)

I have already selected firefox developer edition as the default browser from the Eclipse Enterprise Edition. However, when the browser is open, it cannot open the url generated from eclipse. Suppose, I hit the command 'run as server' on a jsp file. If developer edition is already open, the file does not get open on a new tab. However, if the browser is closed, then it opens with the jsp file.

I have tested that with google chrome and firefox normal edition and in there, it works absolutely fine. But I don't know what went wrong in the developer edition.

I have uploaded two pictures for the convenience.

I've been using firefox for so long, but now I'm having an issues where I'm not able to download anything. Whenever I click on either download or upload buttons, no window popups. I tried Brave browser with same, but it crashes. This problem started on Firefox. Helps would be appreciated. (Sorry due to same issue I can't upload screenshot/video sample of the problem).

Firefox 100.0 Ubuntu 22.04 Mozilla VPN 2.8.0

As the title says, Multi-Account containers doesn't detect the VPN, which means that it's not setting the VPN for specific containers.

I suspect this is actually a problem with the "Allow extension to exchange messages with programs other than Firefox" permission. Could be a VPN issue, but gut feeling that it's a Firefox issue, TBH

Anyone else seeing this?

From what I understand firefox now supports subtitles in picture in picture mode but when I use it for youtube it doesn't work. I have enabled the captions in the advanced settings and I have tried it with all my addons disabled.

Similar to: https://support.mozilla.org/en-US/questions/1329194 https://support.mozilla.org/en-US/questions/1298089

In KDE 5.24.4, Linux. I started to have some issues with "Open containing folder" probably because I installed many Gnome apps which may cause bad configurations in my system.

I suspect this cause this issue even though I don't really have gnome file manager:

https://polywogsys.livejournal.com/309405.html "Gnome based file managers, Nemo/Caja/Nautilus provide the entry org.freedesktop.FileManager1. So it doesn't matter what you set as your default application for the filemanager mimetype - as per the freedesktop.org standard, firefox will always select a filemanager based on dbus (if it's there)"

But because the mimetype points to "dolphin", I dont really have other explanation either: $ xdg-mime query default inode/directory org.kde.dolphin.desktop

I don't want the tabs + search bar to show when the mouse reaches the top of the screen while in full-screen mode, I have tried "userChrome.css" solution provided in this link "https://support.mozilla.org/en-US/questions/1092572", but it didn't work for me, I would appreciate any help, thank you.

I am on Linux Mint, Firefox 100.0 and I am trying to access a website, https://www.citapreviadnie.es:38188 (requires personal DNIe certificate). However, I keep getting SSL_ERROR_UNKNOWN_CA_ALERT. If I view the certificate of the website,

1. Firefox doesn't tell me which part of the chain is invalid or not trusted (or I don't see it) 2. When I try to download and import each of the CA certificates, I get an alert saying "This certificate is already installed as a certificate authority." 3. If I try to import the whole chain, I get another alert telling me "This is not a certificate authority certificate, so it can’t be imported into the certificate authority list." 4. If I try to add a permanent exception to the site, I see "This site attempts to identify itself with invalid information", but if I click "view certificate" I'm back to step 1, and adding the exception does not have any effect.

What am I supposed to do now?