1. I start Firefox and get a blank page. That's normal. 2. I press right mouse button on the blank page to get the windows 7 popup, see pic1.jpg in app. 3. I select "Seite speichern unter..." from the popup and get the save dialog. 4. I select Desktop-folder with left mouse button but I don't press OK-Button, see pic2.jpg in app. 5. I press right mouse button on desktop-folder to open then windows popup but I select nothing from the popup. 6. I press "Abbrechen" in the save dialog. 7. Firefox is gone. No error message. No bug report, just gone. Now you may thing "who really does this ?". You are right, that's not my real problem. My real problem is, that firefox often ends when using the save dialog for a real page in connection with window popup. But this is difficult to desscribe and it does not happen every time. But in this case, it happens nearly every time and I thing, it's the same problem. Have you got the same problem ? Thanks, Norbert