Note: This applies to all problem Firefox Add-ons, not just QTP.
Hopefully this’ll help someone. After installing Mercury QuickTest Professional 9.2 on Windows XP Pro SP2 I realized that my Firefox 2.0.0.12 didn’t start. I mean I double-clicked on the icon and that’s it, nothing! After some Googling recommendations were to start Firefox in Safe Mode. To do so I simply opened up the command prompt and executed the following: “c:\Program Files\Mozilla Firefox\firefox.exe” -safe-mode.
After disabling Add-ons I was able to successfully start Firefox. Next came the task of isolating the problem Add-on. From the Firefox Tools > Add-ons menu I patiently enabled each Add-on and restarted Firefox, one by one.
Lo and behold the culprit was the QuickTest Professional 9.2 PlugIn Add-on.
