See: http://kb.mozillazine.org/Unable_to_save_or_download_files *start with items 9, 10 and 11 on the index list; one of those will usually solve the kind of problem you are experiencing. *if 9, 10, or 11 does not fix the issue, read the rest of the suggestions Download only from Mozilla (you may be directed through one of many world-wide servers (mirrors) for the download in order to spread the server load): *Current version: https://www.mozilla.org/en-US/firefox/fx/ *Current version (choose OS and language): https://www.mozilla.org/en-US/firefox/all.html *Prior '''''supported''''' version (3.6.x): http://www.mozilla.com/en-US/firefox/all-older.html *Also see Mirrors: http://www.mozilla.org/community/mirrors.html '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''