I am running the following
AVAST Free V2014.9.0.2008
Win7 Home Premium
Firefox V25.0.1
Thunderbird V24.1.1
I had this problem before when my system was running XP Pro, FF, Tbird and AVAST
When I open my Tbird it opens an RSS feed that forces the Twitter.widget.log.helper (https://platform.twitter.com/jot.html) to open a blank tab on Firefox. >:(
It does the same with other RSS feeds and other email and browser apps, so it is Twitter, not the apps at fault.
Nobody so far has a solution. 
Is there a way for AVAST to absolutely (without notification) BLOCK that URL? Like it would a virus site, but not notify me.
That would lead to my better sanity. :-*
jgb
