877801 - A gray area about 1" square appears at the upper left hand corner of my screen when I exit preferences - and I can't get rid of it unless I sign out of Firefox - thus loosing all my info saved while using private browsing.

Status: RESOLVED DUPLICATE of bug 641288

(Firefox :: Untriaged, defect)

Description

[trudyjk2]

Attachment: Screen Shot 2013-05-30 at 3.12.38 PM showing gray square at top left of browser page.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:21.0) Gecko/20100101 Firefox/21.0 (Beta/Release)
Build ID: 20130511120803

Steps to reproduce:

I opened the preferences. Then I closed it. That's when the unmoveable grey box about 1" square appears in the upper left of my screen. Nothing gets rid of it except restarting firefox.


Actual results:

Nothing moves this gray box.  There are no red, yellow and green circles at the top of the square.


Expected results:

I should have been able to sign out of preferences and just have it dissapear.

Comment 1

[Tiziana Sellitto [:tiziana]]

Thanks for reporting this. 
Do you have this problem every time you open and close the preferences?
Have you tired in Safe Mode (https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems?redirectlocale=en-US&redirectslug=Basic+Troubleshooting#w_3-restart-firefox-in-safe-mode )

Comment 2

[Tiziana Sellitto [:tiziana]]

Email from the reporter:
"It does happen every time I open & then try to close preferences. The preferences window does not have the red, yellow and green buttons on the upper left. I have to  close it with either the cancel or ok buttons at the bottom right of the window.

I have not tried trying to solve this with the safe mode startup.

My Extentions:
Adblock Plus 2.2.4
Add to Amazon Wish List Button 1.10
Advertising Cookie Opt-out 1.5
Google Analytics Opt-out Browser Add-on 0.9.6
Htttps-Everywhere 3.2.2
Truste Privacy Plugin 2.0

My Plug-ins:
Flip4Mac Windows Media Plugin 2.5.0.1
QuickTime Plug-in 7.7.1
Shockwave Flash 11.7.700.203

I use FireFox 21.0 in the private browsing mode with 3rd party cookies disabled.
What should I do next to see what the problem is with this gray square?"

As in comment 1 try in safe mode

Comment 3

[[:Aleksej]]

Please reopen if you consider this different from bug 641288; its duplicates seem similar.