I got the message that there was an update to Firefox so I decided to download it.

When the installation shield came up, I decided I didn't want to close all of my files that were then open, so I cancelled the installation.

Now, whenever, I try to open Firefox I get the following message:

"The program must close to allow a previous installation attempt to complete. Please restart."

I've restarted countless times now, and still no luck.

Is there a way to reinstall Firefox without losing my passwords and favorites?

Thanks.