ToBos

Yes. The first option of the right click menue (open containing folder) gives the same proble. Windows Explorer crashes, not Firefox nor your add on (Email footer with personal information...

Is there any internal difference between the button [open containing folder] and the first option "open containing folder" in the context menue (right click)? Up to now I allways used...

The problem persists, Windows Explorer crashes sometimes after clicking the button "open containing folder". I used TC4Schell a long time before installing your add-on for Firefox. Windows Explorer never crashed...