I've actually upgraded a few times now and I continue to get this kind of error. Some websites say that I'm using an older version of Firefox and that I must have at least a specific version. However, at the time, I did have the minimum version they stated. Now, I'm trying to install an addon and it repeatedly tells me that I am using 2.0.0.20;EGAMES and will not install. The Help/About pop-up shows "version 3.6.13" under the logo, but the following towards the bottom: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/2.0.0.20;EGAMES 1.0 GTB7.1 ( .NET CLR 3.5.30729) My most recent upgrade was just a few moments ago with a couple of restarts since. Even using the show details link below on this form reports the incorrect version.