615129 - First tab is broken after Firefox 4 Beta is installed

Status: RESOLVED WORKSFORME

(Firefox :: Tabbed Browser, defect)

Description

[Bear]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12

I have found that after I installed Beta 4 of Firefox on my Windows 7 PC, the first tab that opens when I start Firefox 3.6.12 is malfunctioning:

* The tab cannot be closed even after another tab is opened.
* The navigation buttons don't work unless I create another tab.
* The "content loading" pinwheel never stops spinning on this tab, even after all content has finished loading.
* The favicon for the first tab sticks on the second website loaded in that tab.

The problem does not go away even after removing Firefox 4 Beta.

I have tried installing the last three releases of Firefox over my existing install in an attempt to fix the problem, but the problem persists.

Reproducible: Always

Steps to Reproduce:
1. Open Firefox

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+2] (away July 24th - August 16th)]

Can you please create a backup of your profile, and after that running a test in safe mode? http://support.mozilla.com/en-US/kb/Safe Mode 

Could be related to an installed add-on.

Comment 2

[George Carstoiu]

Build identifier: Mozilla/5.0 (Windows NT 6.1; rv:2.0b10pre) Gecko/20110116 Firefox/4.0b10pre

Was unable to reproduce issue on nightly build with Firefox 3.6.13.

Comment 3

[Henrik Skupin [:whimboo][⌚️UTC+2] (away July 24th - August 16th)]

No response from the reporter. Given the last comment I will mark it as WFM.