Firefox Downloads Do Not Work.
Firefox downloads don't open. When they appear in the download box and appear to finish downloading, I cannot click them. When I right click, the "Open" option is gray. I had this problem when I was using my Downloads folder so I switched to my Desktop folder but I have the same problem. Nothing appears on my Desktop or anywhere. This sucks.
This happened
Every time Firefox opened
== I downloaded earlier versions of Firefox.
Opaite Mbohovái (3)
When you right-click a file in the Downloads window, can you use the Open Containing Folder menu item?
It is possible that your anti-virus software is corrupting the downloaded files or otherwise interfering with downloading files by Firefox. You can try to disable the real-time (live) scanning of files in your anti-virus software temporarily to see if that makes downloading work. Do not forget to re-enable the scanning in your anti-virus software after you are finished with downloading and installing. .......... See http://kb.mozillazine.org/Unable_to_save_or_download_files (Disable virus scanning in Firefox preferences - Windows)
I know this was written a long time ago but I just came across the same problem today and thought I'd let everyone know how to fix it. It is actually said in the website provided above, but it's under "Disable virus scanning in Firefox preferences - Windows".
Open a new tab in Firefox and type about:config in the address bar. Then scroll down to browser.download.manager.scanWhenDone and change it to false. I just doubled clicked on it and it changed it to false immediately. Then close the tab and download away!
Prior to doing this, I had gone through all of my anti-virus software and disabled the real-time scanning but the "open" and "open containing folder" were still gray and it wouldn't show on my desktop either. As soon as I did the about:config, it worked. I hope this helps! :)