I have now installed and ran it successfully on my work laptop and home desktop. What I was most pleasantly surprised about is my custom toolbars (using TinyMenu) stayed intact for all but one item which was easy to add back in. As you might of expected, not all my plug-ins worked though.
In the case of RoboForm, Firebug, and the Digg toolbar, it required some manual download and install. For the following though, no additional work was required -- they continued to work:
- Del.icio.us toolbar
- Download Statusbar
- IE Tab
- No Script
- Read it Later
- Web Developer
While I am on the subject of Firefox and plug-ins (add-ons), here's ablog post that lists 30+ Must Have Updated Firefox Extensions. Have fun creating your own customized Firefox.