490829 - Ridiculously slow Firefox Shutdown

Status: RESOLVED DUPLICATE of bug 490828

(Firefox :: Bookmarks & History, defect)

Description

[geos651]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4

When I close Firefox, the Windows Task Manager shows that the Firefox.exe process remains active for five more minutes! The memory by the used by the process gradually increases from 54 MB to 240 MB, and then gradually decreases back to 54 MB. Then the process finally ends.
Apart from ridiculously slow termination, the user cannot even shutdown Windows after closing Firefox!

Note: Google 2 Chrome Beta with the same bookmarks file terminates instantly!

Reproducible: Always

Steps to Reproduce:
1. Launch Firefox with a large bookmarks file.
2. Close Firefox


Actual Results:  
The Firefox process remains active for a VERY LONG time after the Firefox is closed!

Expected Results:  
The Firefox process is terminated immediately after the user closes Firefox.

This a very serious problem and has been present for a very long time, since Firefox 3 switched to Places.SQLITE database.
Since Google Chrome 2 Beta also uses SQLITE and works flawlessly, apparently Firefox designers do not know how to properly implement this database.