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Any help? Tab bar of browser doesn't react to clicks, needs restart

💻 Help

I updated Firefox to version 138 yesterday(29rd April). I use latest stable version of Linux Ubuntu.
Sites itself will work, but top of browser wont. Can click open new tab from +-button, but can't close it.

r/firefox - Tab bar and address bar of Firefox browser
Tab bar and address bar of Firefox browser

Browser stops reacting to mouse clicks when browsing on certain sites(Noble Horse Champion, Flight Rising, FB, Gmail) after hours of browsing and I have to use right-click to navigate on those sites.... Until I restart browser.
I tried to close tab and refresh tab when these problems occurred.

I think this is clearly browser problem(because clicked areas are on browser, not inside tabs), not problem in sites itself, because problem manifested itself after hours of browsing, not immediately.

Edit: I'm not well-versed enough to write Bugzilla-report.
Also in 138.0.1-1 version, where I updated 3rd May 2025.

I've attached two pictures: Area that stops working.(Upper picture)
On another picture, can't close "Archaeology" tab, no matter what.(Picture below)

r/firefox - Any help? Tab bar of browser doesn't react to clicks, needs restart

I tried posting similar message to Mozilla's official support forums, but it's buried amidst spam.

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• • Edited

Same here! i have still no solution. It seems like there is a general problem with firefox for linux users https://www.reddit.com/r/firefox/comments/1kdpzel/some_buttons_on_the_ui_dont_work/

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So I'm not alone! :D

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It seems to be this known bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1955112

Dragging a tab around a bit fixes the problem for some time (Just shortly grabbing a tab with the mouse is enough to fix it).

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• • Edited

I have the same problem and I haven't noticed that it only happens on certain sites. I believe this is a general problem of the browser, regardless of the website. I am using Firefox Snap on Ubuntu. It started with version 138.0. The "Close tab" button will stop working, also the extension buttons, the history button and the menu button. The only way to enter text into the address field is by pressing "Ctrl+L", because clicking in it doesn't do anything.

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Please use Bugzilla to search for bugs or report new ones. Pick the Report a new bug in a Mozilla product → Firefox option: screenshot.

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Thanks. I have filed a bug report for this: https://bugzilla.mozilla.org/show\_bug.cgi?id=1964250

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• • Edited

I have now filed a bug report for this: https://bugzilla.mozilla.org/show\_bug.cgi?id=1964250

Edit: Probably a duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1955112

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Also having this problem. I'm using Fedora 41, firefox 138.0.1
When I move Firefox to a different workspace it seems to fix the problem.
I have also been enjoying using keyboard shortcuts
Close Tab: ctrl + w
New Tab: ctrl + t
Reopen last closed tab: ctrl + shift + t
back: alt + left
forward: alt + right
switch tabs right: ctrl + tab
switch tabs left ctrl + shift + tab