Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was archived. Please ask a new question if you need help.
Solved Archived

How do I disable translucent tab and menu bars in Firefox 57?

Firefox Settings
j3rk replied
j3rk
j3rk

I gave up on having useful extensions and decided to install FF57. While it's mostly working with my custom userChrome.css file, I can't seem to figure out how to make the Menu bar and Tab bar backgrounds a solid color, instead of showing my other windows running behind Firefox. I understand that it will happen with the title bar, since I have Aero enabled on Win7, but it shouldn't do it for the tab or menu bars, since it's very distracting. I tried switching themes in the customization page and tried some userChrome.css "fixes" that don't seem to work in this version. How can I disable this so my tab bar and menu bar have backgrounds that match the rest of the theme?

I gave up on having useful extensions and decided to install FF57. While it's mostly working with my custom userChrome.css file, I can't seem to figure out how to make the Menu bar and Tab bar backgrounds a solid color, instead of showing my other windows running behind Firefox. I understand that it will happen with the title bar, since I have Aero enabled on Win7, but it shouldn't do it for the tab or menu bars, since it's very distracting. I tried switching themes in the customization page and tried some userChrome.css "fixes" that don't seem to work in this version. How can I disable this so my tab bar and menu bar have backgrounds that match the rest of the theme?
Attached screenshots

All Replies (1)

j3rk
j3rk Question owner

Chosen Solution

Nevermind, I figured it out with the debugger. I need to force the background-color in my userChrome.css file for #TabsToolbar and #toolbar-menubar to match the theme color (the light theme seems to be #f5f5f5f).