Firefox was part of my user account that had become corrupted. I created a new account, and took ownership of the corrupted accounts files. When I logged onto the corrupted account, I could no longer open Firefox. I COULD open IE. I took back the files, and still could not open Firefox. I unistalled Firefox on the corrupted account, and tried re-installing Firefox,and I cannot do it. I get a window asking me if I want to open or save the Firefox Setup 5_0_exe, I click "open" and nothing happens. I miss Firefox!