1095482 - Tab switching failures by mouse when many tabs are displayed

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[consulgroup]

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:33.0) Gecko/20100101 Firefox/33.0
Build ID: 20141105223254

Steps to reproduce:

Numerous tabs open: >9 tabs
Mouse unable to access immediately adjacent tab: left or right of current focus

Notes
Sounds like Bug 365184 [unresolved]
First noticed in 33-branch



Actual results:

Immediately adjacent tab inaccessible by mouse

Workaround - mouse
Select any other displayed tab
Reselect the previous inaccessible tab


Expected results:

Immediately adjacent tab accessible immediately by mouse - as is any other displayed tab

Comment 1

[Loic]

Did you test in safe mode (https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode) and with a clean profile (https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles)?
Is it 100% reproducible with your current profile?

Comment 2

[consulgroup]

(In reply to Loic from comment #1)
> Did you test in safe mode
> (https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-
> mode) and with a clean profile
> (https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-
> firefox-profiles)?
> Is it 100% reproducible with your current profile?

Safe mode: no tab switching problems
Clean profile: ditto

Yes, reproducible with current profile: clearly arises from this. Ok to close report.

Comment 3

[Loic]

Safe mode disables add-ons, so maybe one of them is the culprit.
You can reset your current profile (a copy is saved on the desktop) to keep your data:
https://support.mozilla.org/en-US/kb/reset-firefox-to-fix-most-problems

If it's back, feel free to reopen the bug report.