User Agent: Mozilla/5.0 (Windows NT 6.0; rv:9.0a1) Gecko/20110902 Firefox/9.0a1 Build ID: 20110902072738 Steps to reproduce: Whenever I close a tab in Nightly, before the tab actually closes it will show the tab I am trying to close for a quick second before it will actually close it. This is only if you're on a different tab to the one you're trying to close. Actual results: I have explained in the above paragraph. Expected results: It shouldn't have shown the tab I was closing at all.
Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode How about with a new, empty profile? http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile Please post the graphics section from about:support
Mozilla/5.0 (Windows NT 5.1; rv:9.0a1) Gecko/20110902 Firefox/9.0a1 I'm getting this too, it's probably because of the fix for bug 679255.
(In reply to Tim (fmdeveloper) from comment #1) > Does the issue still occur if you start Firefox in Safe Mode? > http://support.mozilla.com/en-US/kb/Safe+Mode > > How about with a new, empty profile? > http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new- > profile > > Please post the graphics section from about:support I have just got done trying it in both safe mode & a new profile and the bug still persists. And according to the comment above this one I'm not the only person with this problem. Thanks for the reply.
> Please post the graphics section from about:support http://i.imgur.com/vJP4t.png
I think I see what you mean - it does briefly appear to change to the tab before closing Confirming and cc'ing for additional eyes
Created attachment 558284 [details] [diff] [review] patch I tried to write a test for this, but it's a pain since tabbrowser.xml uses setTimeout in addTab() to show the close button and tabbox.xml uses setTimeout in the mousedown handler.
Note that there's another drawback from 679255's landing. Right-click on the active tab focuses the tab itself occasionally, showing the dotted lines.