First, set that back to 2000. It prevents certain types of security
attacks. See the "good reasons for this delay link on this page:
http://kb.mozillazine.org/Disable_ex...elay_-_Firefox
Since you already tried running in Safe Mode, your problem is probably not
due to a bad add-on.
My best guess is that you can fix the problem by going to Tools -> Options
-> Privacy, and un-checking the "Remember what I've downloaded" option.
Then restart Firefox to see if the problem is gone. Firefox's download
manager seems to slow down as the number of previously downloaded files
grows larger, so the best prevention is to simply tell it to not remember
what was previously downloaded.
Bookmarks