I'm not sure why firefox going crazy on my browser, every time I open my browser(Firefox) its follow up with multiple pop pup of blank windows itself, It's an empty window with nothing else just white and clean and of course to much .. At first thought it was coming from malware but I think it is Bugs from firefox itself.
When I google myself, I've found some solution that might help too..
To do this, First
Open your Firefox
It will open this.
Delete the file named mimeTypes.rdf.
Then Restart your firefox
Gud Luck. :)
Pss.. Make sure your Flash is updated.