Forum der Gemeinschaft Firefox

The bug exists since Firefox version 131.0 circa, when some things related to DPI had been changed, which I was able to guess because, without touching anything, the size/zoom of the content of the websites were slightly different (bigger). Experiencing this in both Windows and Xfce.

Steps to reproduce:

• Have a custom DPI settings in your operating system.
• Open a new Firefox window.
• Note how the Firefox window height is shorter, so yo can see about 20 pixels of your desktop background. Manually resizing the window and restarting the browser has no effect: the correct height is not remembered.

I've reported this one year ago in the tracker, but no one has yet done anything about it: https://bugzilla.mozilla.org/show_bug.cgi?id=1925284

Am I the only person in the world using Firefox with a custom DPI setting in the OS? I find this hard to believe. Yet I'm experiencing this bug since one years ago. I can't stand using a different browser, but having to resize the window every time is so annoying...

Machine: Dell Inspiron 15 CPU: Intel i5-7200U @ 2.5 GHz OS: Ubuntu 24.04 LTS RAM: 16 GB GPU: AMD Radeon R5 M445

Yesterday I switched on my PC, opened Firefox and the home page was black. See the attached screenshot. This is not caused by some accidental switching on of the dark mode. Dark mode is clearly off. Neither can I adjust settings to make the Google home page revert to its customary light grey shade.

This isn't a big deal, I know. And it has happened before and in a short period gone away by itself. Maybe it is to do with a glitch in the latest Firefox version. But it has an unpleasant appearance and discourages surfing.

My Chrome Google home page doesn't have this issue.

Can anyone advise on how to fix this unwanted black screen problem ?

as is the text I read takes only 1/3 of the available width of the screen. In reading mode I can widen that, but many pages lose a lot in reading mode. How can I widen the text in normal mode?

Hi!

How do I get the sidebar (with vertical tabs) to be expanded whenever I open a new window of firefox? Despite always opening it, whenever I open a new firefox window, it is collapsed.

I'm using version 149.0 (64-bit) from the Fedora repositories.

Thanks!

I'm using Ubuntu 24 with the XFCE desktop. I'm installing the debs straight off packages.mozilla.org (currently 143.0.3).

Firefox's title bar, and window manager buttons do not have the same look and feel as the rest of my windows. And I have no idea where they're coming from.

They do change appearance in response to picking the different styles in Settings > Appearance, but the changes appear to be limited to colors only. The minimize, maximize and close buttons look differently than on all other windows, and they are more spread out than in, and the shade button is nowhere to be found.

I'm attaching two small images, the first one is the standard set of widgets all other windows have, and the second one is Firefox's odd duck. I could not find anything in settings. "Extensions And Themes" shows that "System theme" is enabled. Well, it's coming up a bit short...

After latest update 136.0, a TB icon showed up in the 'system tray'. I'd like to hide it, I have no use for it. Browsing the settings including the advanced preferences yields nothing useful.

Hi,

When I first open Firefox, everything will be normal. But after opening a menu (e.g. dropdown from the bookmarks bar, or downloads menu next to address bar) for the second or maybe more time, the menu will show up in the wrong location, maybe halfway across or down the screen. I am usually able to bring my mouse over to where it is shown and click the buttons, although sometimes the buttons show a hover animation when my mouse is where they are *supposed* to be and I must reopen the menu to be able to interact with the buttons where they are actually shown. Contracting the window fixes the problem, but it comes right back when I maximize the window. It will also happen with tooltips, such as the name of a tab when I hover over it.

I am using Fedora 42 GNOME Wayland with two monitors, one at 125% scaling and other at 100% scaling; the issue happens on both, but independently of each other. I have tried enabling the Firefox setting for fractional scaling, but nothing was fixed. Any way to make menus show up where they are supposed to?

Hallo, ich benutze immer den aktuellen Firefox unter Debian Trixie. Ich habe jetzt das Problem das sich das Fenster meines Firefox nach einiger Zeit der Untätigkeit von selbst verkleinert. Sprich, wenn ich einen Button drücken möchte dann muss ich mit dem Mauszeiger eine Zeile höher drücken als der Button liegt. Meine Treiber sind alle aktuell und ich habe früher dieses Problem noch nie gehabt. Wäre euch für eine Hilfe dankbar. mfg Schorsch

A while ago I made some changes in about:config and also in my ~/.config/gtk-3.0/gtk,css file so as to control my scrollbar and slider -- making them more visible:

/* Log out, and back in for these changed to take effect: */

scrollbar { background-color: #cccccc; } scrollbar slider { min-width: 20px; }

/* dark green: pointer is not in the active window */ scrollbar slider:backdrop { background-color: #00aa00; }

/* green: pointer is in the active window but not on a slider */ scrollbar slider { background-color: #00ff00; }

/* dark red: pointer is hovering over slider but mouse button not pressed */ scrollbar slider:hover { background-color: #aa0000; }

/* red: slider is active */ scrollbar slider:hover:active { background-color: #ff0000; }

/* No effect: */ /* scrollbar-color: blue white; */

... it works half the time. Some pages obey the above settings but other pages continued to show a scrollbar about a mm wide with the slider so faint as to barely be visible. So, in 'about:config' :

widget.non-native-theme.scrollbar.size.override 30

... at least made the narrow scrollbar a bit wider. But how to change it's color? Doing this in a file:

~/.mozilla/firefox/5dqk4533.default/chrome/userContent.css:

html,body{

   scrollbar-color: yellow blue !important;
  }
.... doesn't change anything.  Is there some complete guide to controlling the srollbars?  Nice if it could all be handled in one place of course.

On Linux Mint 22 on my desktop, the buttons in the RH top corner are tiny. I have measured the minimise line and it is under 2mm long.

I have tried various searches to see if these controls could be made larger, but most questions suggest changing the theme. I don't want to do that, and I'm sceptical that it would make any difference anyway.

Has anyone got any suggestions how they could be made bigger?

I'm using the MATE desktop.

Thank you

Hello people,

I have a problem. At the moment I am running a Firefox version 143 on Linux with different windows. At the top left you can then select which windows you want to use. Only now it has disappeared. You get a home page. I have tried several solutions. Anyway, how do you get the rest back? Thanks.

So my question is Firefox is on my Cent OS 10 machine and it only shows the close button on the upper right corner, I would like to know two things, 1. How to add the Minimize, Fullscreen buttons to just the close button on the upper right corner. 2. How to get my menu bar back - the home button and all of the other goodies that normally show on the left of the browser just above the Forward, back and refresh buttons?

Thanks in advance for the help.

Same Problem as here but thread is archived: https://support.mozilla.org/en-US/questions/1465988

It has always worked great until now, but it seems that it no longer works with Firefox 147.0.1. Does anyone have any idea how to fix this?

I really enjoy using the recently added sidebar, but I want to put it away temporarily while watching videos. After some digging around, I finally found the simple keybind for expanding it (ctrl-alt-z). With the 'hide tabs and sidebar' option toggled, I'm able to open and close it at will, which is exactly what I wanted.

However, whenever I do this, the sidebar snaps to what I assume is its default size (picture 1). I usually use it at minimum size (picture 2,) such that only the icon of each tab shows. I tried to readjust it, but it seems to not snap to this size anymore unless I disable 'Hide Tabs and Sidebar.'

For now, I'm just going to temporarily toggle that setting on when I want it out of the way, and manually fix things later. But, is there a way I can have the best of both worlds? Can I make the 'default' the sidebar snaps to the minimum size I usually use from Picture 2?

Thank you in advance.

Moments ago I rebooted my computer after a long day of heavy use (it's old). After rebooting and opening my Firebox Browser, I noticed all my Bookmarks were gone. I created a Firefox Bookmarks Export file on another desktop computer using a thumb drive and plugged it into my current desktop computer, and imported the Bookmarks. Great. They all seem to be there again. But the entire appearance of all the websites I regularly use have changed. I use Google Calendar and all the colors are gone. On my other computer, all the different tasks I've created still retain their colors with white lettering, but on this latest version of Ubuntu machine after the reboot, all by tasks are plain white with Black lettering. I compared the settings for Appearance on my two different computers and they are exactly the same. I couldn't Login to X on this machine after doing so numerous times, and after I logged into Bluesky, the appearance was completely different. I don't know what happened. The two attached screen grabs show the difference between this computer and my other one which still shows the color combinations that I want back within Google Calendar. Any idea what went wrong? Also, I tried to click the checkbox below that says, "Email me when someone answers the thread," and I could not. It wouldn't accept the check mark.