I am taking it back. This Firefox is as much of a nuisance as Aurora. I remember when Aurora, though at the alpha level did its darnest to take over Mozilla Firefox.
I don't know what it has been trying to do, but, when I tried to install this 5.0 b2, it tried to install in the default location where 3.6.17 is located. I succeeded in installing it in a folder of its own, call Firefox 5.0. When I looked at the Desktop, I saw three Firefox shortcuts, two of which were not valid, and could not be deleted, and the old Mozilla Firefox shortcut, which had been 3.6.17's shortcut. In addition, I had to create a shortcut for the new installation, which I renamed from firefox.exe to Firefox 5. A few minutes ago, when I clicked on the Mozilla Firefox shortcut, it brought up FF 5. The Mozilla Firefox shortcut had become a shortcut for Firefox 5. I deleted that shortcut, and Secunia PSI told me that a Mozilla Firefox 4.0 Zombie file had been removed.
I went to the Mozilla Firefox folder in the default location, and it seems to have been left intact. Only the shortcut was messed with. I created another shortcut from that folder's firefox.exe. Now it tells me that it is 3.6.17's shortcut.What in the world is being done is beyond me. If the developers want only one version, and want to make a beta the default, they should say so. I am not going to allow them to mess with my way of doing things.
And, they will know about it.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:220.127.116.11) Gecko/20110420 Firefox/3.6.17