Wednesday, April 13, 2011

How to Remove Disabled Greyed-Out Add-on Extensions in Firefox 4: e.g. the Microsoft .NET Framework Assistant (ClickOnce) Extension

See the following link for instructions on how to

"Remove the Microsoft .NET Framework Assistant (ClickOnce) Firefox Extension

[Update 2012 -- once you get to the folder Extension in those instructions, click on it and various "strings" like for example
will appear in the right column. Click on any string and a dialogue box will appear, telling you which add-on that string represents -- each such string that represents a grayed-out add-on that you no longer want can then be removed and each such removed grayed-out add-on will have disappeard on the Firefox add-ons list the next time you start Firefox.]

All of the instructions given there worked fine for me (I also removed a disabled media player extension via regedit there at the same time),

except that to  find the

DotNetAssistantExtension folder for deletion

I looked for

%SYSTEMDRIVE%\Windows\Microsoft.NET\Framework\v3.5\Windows Presentation Foundation

in the "run" search box that opens at the bottom left of the screen when you click the Microsoft Windows logo there. This took to me to the right place in the files where I deleted the DotNetAssistantExtension folder.

When I restarted Firefox, all of the greyed out programs I had deleted no longer appeared as useless entries in Firefox 4 add-ons, leaving more visible room for useful new add-ons.

Of course, I herewith report on MY experience ONLY and this is NO GUARANTEE that it will work for you. I assume no liability for anything that any user does on his PC or other machine. If you are not a techie, get this done by an expert so you do not delete something you need.

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