355247 - Uses 100% CPU when running under a different user than the one who logged in into the GUI session

Status: RESOLVED DUPLICATE of bug 357852

(Firefox :: General, defect)

Description

[Andreas Wuest]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7

If Firefox is run under a different user than the one who logged in, it uses 100% CPU and only browser windows can be opened, but no other windows like the error console or the about dialog.

This worked flawlessly with the 1.8.0 branch.

Reproducible: Always

Steps to Reproduce:
1. Log into the desktop
2. Open a terminal and su to a different user
3. Run Firefox from this terminal

Actual Results:  
Firefox uses 100% CPU, and no windows except new browser windows can be opened.

Expected Results:  
Normal CPU usage, and windows can get opened normally.

Comment 1

[Andreas Wuest]

ktrace seems to indicate that Firefox is reading from the same two or three positions in classic.jar and en-US.jar over and over again, without end.

Comment 2

[Andreas Wuest]

This behaviour occurs on 1.8.1 (tested with Firefox 2.0 RC1 and several older nightlies) and on trunk.

It works correctly with Firefox 1.5.0.x.

Comment 3

[Andreas Wuest]

This is actually caused by setting nglayout.debug.disable_xul_cache to true. I was mistaken by the fact that only my not-logged-in user runs with this setup.

*** This bug has been marked as a duplicate of 357852 ***