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Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

My active tab (in tab bar) displays incorrectly

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  • 1 inale nkinga
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  • Igcine ukuphendulwa ngu Odin3

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The tab bar should distinguish the active tab (in part) by removing its bottom border. When I restart Firefox, the tab bar displays correctly but before long that bottom border of the active tab reappears. Changing to a different theme doesn't help. All I can think of is that perhaps I have too many add-ons or bookmarks installed. (I currently have just under 50 add-ons.) What can I do to keep that bottom border off the active tab?

All Replies (4)

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Can you provide a screenshot of this issue? Thanks.

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Thanks, Ty, for your interest. In the screenshot, the Wikipedia tab is the active or selected one--and it's supposed to be distinguished by the absence of the bottom border, which, as you'll see, is not absent.

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Are you using a userChrome.css file to style the Firefox user interface ?


Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window
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Thanks, cor-el. I always appreciate you helpful replies.

I gather your first step would be to test the issue in safe mode. There are two problems with that. (1) This issue does not kick in immediately upon restart. The issue does not appear for a while (hours or more). (2) If the default theme is "Default Theme (Black Background)," it seems that theme does not have the bottom border on any tabs.

(I do use userChrome.css, but I'm not aware that it has affected my tab bar tabs.)