Firefox Community Forum

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#

Hi,

There is no customization panel under settings/home. can you please tell me where can i find the customization panel? I want to reset the wallpaper to default.

I am experiencing a weird scaling issue on one of my monitors with Firefox. The whole firefox window looks as if it's scaled to high resolution mode. Not just zoom of the content, but the whole window, including the title, toolbars, etc.

Note that only happens on ONE monitor (I've tried this on total 6 monitors now), and it happens only on one Firefox Profile. If I use a new profile, the issue is gone. However, if I copy the profile folder to the newly created profile, the issue comes back.

Here is a screenshot of the two windows opened at the same time on the same screen. Right window is normal, and the left window is the scaled up version.

https://i.imgur.com/ikq00DA.png

I don't want to re-create my entire profile if I don't have to. Does anyone know what kind of setting/feature did this and how can I revert it? Since it does not happen on a different profile, and is replicable by copying the profile settings, it must be some kind of a firefox setting somewhere.

Firefox Search Field changed to a drop-down with Icon + Search Engine Name instead of the previous 3-6 icons on a row with Search Engine Name only appearing when you hover over the Search Engine icon? How do I change Firefox back to the old Search Engine field user interface?

Attached is the new UI which takes up too much screen space if you have a lot of Search Engines installed in the Search Engine Field. I'd like to revert to the old code. If the old code is no longer in Firefox, what version do I have to downgrade to in order to get that old user interface back?

In "Language and Appearance" Dark theme is selected. Also in "Themes" the dark theme is selected. Some websites are displayed in light colours, despite this, which is an annoyance, but not yet a problem. The problem is the "light" websites are displayed in pink-ish palette, which seems to correspond to the default light theme. browser.display.background_color is set to #FFFFFF, so no pink here. privacy.resistFingerprinting, which should have no impact, but one help article suggest that it might interfere is set to false The problem appeared after the last restart, which may also mean the last update. Any ideas how I can make either the dark theme work properly or at least have the webpages displayed in their original colours rather then pink hue?

Hi! I'm having a really weird problem with fonts in Firefox on my Macbook Pro M1 14-inch 2021. Specifically, the fonts in the bookmark sidebar appear to be corrupted and replaced with nonsense characters that have a lot of accents. I've tried rebooting, clearing all Firefox cookies and site data, reinstalling Firefox from an earlier version on my Apple Time Machine (from a time when I didn't have this problem), checking to see if the problem persisted when all extensions were disabled (it did, even after restart with all extensions disabled), and a reboot in safe mode. The reboot in safe mode temporarily fixed the problem and I was pretty excited, but it came back. I tried updating my Mac from Sequoia to the most recent OS (Tahoe 26.2), and the problem was still there, so I tried rebooting in Safe Mode again and the problem went away, but only while I remained in Safe Mode. This time the problem came back when I reopened in regular mode. So whatever the problem is, it's something that Safe Mode counteracts. Can someone help me figure out what's wrong?

After the latest install of 151.0.2 (aarch64), the VPN logo is massive! Is this just a glitch from the latest update?

I've attached a photo for clarity.

Best,

Ed

MacOS 26.0.1 Tahoe Firefox 143.0.4 (aarch64)

There is a white border around the webpage content in the browser (screenshot attached). This border exists even in troubleshooting mode, with all extensions disabled, regardless of toolbars or theme, etc. The only place it does not appear is the about: pages (screenshot attached). I've uninstalled and reinstalled Firefox and updated MacOS. The issue disappears when I quit and reopen Firefox but reappears when I resize the window. Is there some obvious checkbox setting I'm missing? I cannot figure out what is causing this. Thanks for any help.

Really odd. I tried restarting and it didn't help.

All of a sudden it was double spaced and the icons look different, too. I checked and my font selection is the same: Helvetica.

I'm attaching a screen shot.

Suggestions?

E.