Problem: All of sudden, Firefox would completely freeze on me, if I tried to either download or upload a file. I had to kill it using the Windows task manager.
Searching for a way to fix this problem, I noted how there seems to be many different ways to make Firefox freeze, but I did manage to find help fixing the problem.
Fix: I found this mozillaZine knowledgebase article and used its instructions for manually resetting the download folder:
- Opened the list of application settings by typing in 'about:config' in the address bar.
- Typed in ‘browser.download’ in the Filter Box.
- Reset the browser.download.dir; browser.download.downloaddir; and browser.download.lastdir values to some default directory, that I was 100% sure existed.
- Restarted Firefox – everything works fine now.
I suspect the problem was caused by the value of browser.download.lastdir pointing to a no-longer connected network drive.
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