Hi...
I'm currently on Firefox version 3.6.25 running Win7 (64-bit) Home...
I've never had a problem opening FF until a couple of days ago. That's when I installed Thunderbird. My Avast Free version is updated daily and I've been using Avast for years without problems.
After I'd updated Avast today, when clicking on the Firefox icon (pinned to taskbar) as normal to open, nothing happens.
If, however, I then open TBird, then close it, my FF Start Page opens!
I've not added anything to FF or TBird in the way of add-ons.
The only thing that's been updated as it is daily is my Avast anti-virus.
I found that stopping Avast's 'Web Shield' component, allowed the FF Start Page to show. Clearly, though, I had to restart the Shield.
I've tried restoring my system to a different date in order to ensure TBird was not present.
These restores have loaded fine, all other programs working - but when I click on the FF icon...well....you know the rest.
This would seem to suggest Avast is causing the problem and only since after today's (30 Dec 2011) update.
Can anyone suggest what's wrong?
Many thanks