529894 - Taskbar previews disappear and reappear

Status: RESOLVED INCOMPLETE

(Firefox :: Shell Integration, defect)

Description

[admiralsovereign]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2b3) Gecko/20091115 Firefox/3.6b3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2b3) Gecko/20091115 Firefox/3.6b3

When using Firefox 3.6 Beta 3 (no specific website), it will randomly freeze (spinning blue ring).  I have used about:config to enable Windows 7 Taskbar Previews.  Initially, they work (after launch).  However, one the browser freezes the Firefox icon in the taskbar collapses into a single icon and the preview only shows the browser window.  When the browser freezes again (it just did), the browser icon in the taskbar will "un-collapse" back into its tabs.  This alternating pattern continues ad-naseum.

Reproducible: Always

Steps to Reproduce:
1. Open Firefox 3.6 B3
2. Use the internet
3. Wait for the browser to freeze, note state of taskbar icon (should have working taskbar previews)
4. Wait for the browser to freeze again and note state of taskbar icon (now it will have a single icon)
Actual Results:  
Browser temporarily freezes and the taskbar previews collapse into a single icon.

Expected Results:  
Not freeze, and the taskbar previews should work.

Following Extensions Installed
Adblock Plus
All-Glass Firefox 2.1.2
Download Statusbar 0.9.6.5
FaviconizeTab 0.9.8.2
Greasemonkey 0.8.20090920.2
Hide Menubar 1.0.20090929
Open IT Online 2.5.1
Remove It Permanently 1.0.6.6
Smart Bookmarks Bar 1.4.3
Stylish 1.0.7
XMarks 3.3.2

Comment 1

[Matthias Versen [:Matti]]

Please always test if you get issues in the Firefox safemode :
http://support.mozilla.com/en-US/kb/Safe+Mode

Comment 2

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.