In case it helps, here's how I installed Firefox 1.0.7 this morning.
1. Downloaded "Firefox Setup 1.0.7.exe" to my D:\Setup folder (you can download it to any location) using the "Free Download" link at
http://www.mozilla.org
2. Removed my previously-installed Mozilla Firefox 1.0.6 version using Control Panel, Add/Remove Programs. (This step is not needed with current Firefox versions, but old habits die hard.) My Firefox
profile with all my user data (bookmarks, passwords, etc) and my installed plugins were not touched by the uninstall.
(If you haven't cleared your Windows Temp folder recently, now is a good time. On Windows XP, go to Start -> Run and type in
%temp% to open the temp folder, then select all files and delete them.)
3. Disabled my antivirus program and then double-clicked the "Firefox Setup 1.0.7.exe" which started the Firefox 1.0.7 installation, a very simple process.
So far my four extensions seem OK:
UserAgent Switcher 0.6.6
BBCode 0.4.1
Greasemonkey 0.5.3
Sage 1.3.5
Fulvio, there's mention of upgrading to Firefox 1.0.7 and extension issues here:
http://www.mozillazine.org/talkback.html?article=7389
Mozilla Firefox 1.0.7 Released
http://forums.mozillazine.org/viewtopic.php?t=320474
Which Extensions will work?
I've seen it suggested to disable, then reenable problem extensions, kind of like a kick-start. From the last link above:
In the Extension Manager window, right-click on an extension. In the context menu that pops up, there should be a disable option. After it's disabled, the extension should be grayed out.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7 (ax)