This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

tab background is only partially painted

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by ninveh

more options

Tabs were looking fine in FF 49. I upgraded to V.50.0.2 and now all active tabs are painted with a rectangular background region instead of over the full tab area. Please see attached picture. I've disabled all the addons that might even be remotely suspiciousm cleaned the cache, rebooted the machine - no change.

However, if I create a new profile, the tabs are rendered correctly as was the case before the upgrade. I am trying to avoid a permanent creation of a new profile and migrate everything that I've got to the new profile. If there is a simple solution to this, I'd be thankful.

Running under WIN7 32bit.

Tabs were looking fine in FF 49. I upgraded to V.50.0.2 and now all active tabs are painted with a rectangular background region instead of over the full tab area. Please see attached picture. I've disabled all the addons that might even be remotely suspiciousm cleaned the cache, rebooted the machine - no change. However, if I create a new profile, the tabs are rendered correctly as was the case before the upgrade. I am trying to avoid a permanent creation of a new profile and migrate everything that I've got to the new profile. If there is a simple solution to this, I'd be thankful. Running under WIN7 32bit.
Attached screenshots

Chosen solution

Thanks for the pointer. Although I have not found the root cause, I may have a solution that suits me afterall.

1. I started FF in safe mode (HW acceleration has always been off ) - still show the problem. 2. Then I noticed that if I switch a theme to anything in the provided list OTHER THAN THE DEFAULT THEME, the tabs now look OK. 3. My solution is now just to find a theme that I like (I've always used the DEFAULT) and circumvent the issue.

The root of the problem may lie in one of my old custimazions of the options available through the about:config , but I loathe the thought to go through the options by a way of elimination, Finding a suitable theme is so much faster...

Thanks again.

Read this answer in context 👍 0

All Replies (2)

more options

Gotta be an add-on (extension) or a user customization causing that glitch on the tab-strip.

See this: https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

more options

Chosen Solution

Thanks for the pointer. Although I have not found the root cause, I may have a solution that suits me afterall.

1. I started FF in safe mode (HW acceleration has always been off ) - still show the problem. 2. Then I noticed that if I switch a theme to anything in the provided list OTHER THAN THE DEFAULT THEME, the tabs now look OK. 3. My solution is now just to find a theme that I like (I've always used the DEFAULT) and circumvent the issue.

The root of the problem may lie in one of my old custimazions of the options available through the about:config , but I loathe the thought to go through the options by a way of elimination, Finding a suitable theme is so much faster...

Thanks again.