537570 - MS Dot net assistant crashing FireFox, re-installing itself.

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Flanker15]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6

The Microsoft Dot net assistant extension is causing Firefox to hang after a random amount of time usually a few minutes. The extension isn't present in my extensions tab and the WPF add-on is disabled by default but the files are still causing Firefox to crash.  I can fix the problem by deleting the contents of "C:\WINDOWS\Microsoft.NET\Framework\v3.5\Windows Presentation Foundation\DotNetAssistantExtension" and removing its reg key, this stops the crashing.
However the files will reinstall themselves (whenever I boot the computer I believe) and the problem returns until I remove them again.
I've tried reinstalling Firefox and searched for the source of the reinstall with no success so far.
I have another computer that isn't having this problem and does have the files installed but it is running on Win7.

Reproducible: Always




The error in the log I get after a hang.

"Error: uncaught exception: [Exception... "Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) nsIPrefBranch.clearUserPref" nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)" location: "JS frame
chrome://dotnetassistant/content/bootstrap.js
BootStrapDotNetAsssitantExtension :: line 52" data: no]"

Comment 1

[Flanker15]

Managed to block the reinstall.

Comment 2

[Dave Garrett]

FIXED is for when a change by Mozilla fixes a bug for everyone. WORKSFORME is for when it's just fixed on your end or is otherwise no longer reproducible.