Firefox Community Forum

Is there a way using the userchrome.css file that I can get back the coloured toolbar icons I had for the home, reload, stop, backwards and forwards buttons? They were coloured until version 143 arrived. These updates just make Firefox more drab by altering things and preventing the settings in my css file from continuing to work! Anyone managed to fond any code for the css file that still works?

I installed firefox on my new windows 11 dell. I imported my existing bookmarks using json file format. When I bring up firefox I have two vertical columns on the left side of my screen. One is my bookmarks and to the left is this is a real time column that lists the sites I visit. Is there some way to disable this 2nd column? thanks brian

I am using a wallpaper on the New Tabs page.

It's nice. But I would like to do one additional thing with them: Adjust the selected wallpaper based on the dark or light mode on the operating system, for example by toning the brightness down a bit when using dark mode, or choosing a different image/color altogether.

I don't think this is possible using the settings alone, but maybe using useChrome.css? However, I cannot figure out how exactly to do that.

Just wanted to drop in here and give an update to my original post detailing how to hide the tabs and address bar when in fullscreen mode, using the View/Toolbars/Bookmarks Toolbar/Never Show command. With this css in place and the preferences set, toggling the bookmarks toolbar in fullscreen mode will toggle everything at the top of the FF window (but won't do that unless fullscreen is active).

This code changed recently (like, today) because the "collapsed" attribute from the #PersonalToolbar item no longer toggles between "true" and "false" when the user hides/shows the toolbar — instead, the "collapsed" attribute disappears entirely when the toolbar is showing, and reappears to be assigned the value "" (yes, empty) when the toolbar is hidden.

--- Here's the CSS. It goes into a text file called "userChrome.css".

root[sizemode="fullscreen"] #navigator-toolbox:has(#PersonalToolbar[collapsed=""]) {

 visibility: collapse;

}

--- On the Mac, here's the location. The CSS file then goes into a "chrome" folder in the "Profiles" folder located within your Mac user account's "Library" folder (not the Profiles folder within the Library folder on the root of the system drive, but the one in your computer account Home folder). You'll probably need to create the chrome folder. Just put the CSS above into a text file, name that file "userChrome.css" and drop it in the location shown below. Quit Firefox first, of course.

/Users/<user>/Library/Application Support/Firefox/Profiles/<profile>/chrome/

--- You'll also need to set the about:config options in Firefox to allow legacy user profile customizations. Go to about:config in the browser, and search for "toolkit.legacyUserProfileCustomizations.stylesheets" and set this preference to "true".

--- The code only updated slightly today. See my original "question" here: https://support.mozilla.org/en-US/questions/1448596#

When I hover the cursor over the Firefox icon all my open windows appear but they no longer shrink to fit the screen. Since the thumbnails don't shrink, the last windows opened disappear off the edge of the screen and I can't find a way to drag them back into view. In the past if I opened too many thumbnails they used to shrink, then turn into a list. I can't find anything in settings to fix this. Please help.

The Firefox Icon in the top left now has taken more space below it next to the bookmarks, and after closing and opening the browser, the Icon is now sharing space with my tabs. Not sure what caused it, disabling all extensions and themes did nothing. If I can't figure anything out from here I may try to reinstall Firefox entirely, would just rather not have to go through that and have to set everything up again.

I am looking for a way to hide the title bar for Firefox while in Fullscreen mode on macOS. Currently it is quite bothersome when I go to click a tab and the title bar pops in and moves everything down. I often then move my cursor down and try to click on the tab, but by then the title bar hides and causes me to refresh the page or click the address bar.

This issue occurs when I already have 'Title Bar' disabled in my customization settings, which is odd because I expect this setting to hide the title bar entirely.

Chrome handles this nicely, where the Close, Minimize, and Expand/Collpase buttons are kept to the left of the tab bar, even in fullscreen mode. It seems Firefox also attempts this, but for some reason it only does this when it is not in fullscreen mode. It would be nice if firefox could maintain these buttons to the left of the tab bar, and prevent the title bar from showing entirely, when in fullscreen.