Freezing after posting?
 

Almost all of the time, after I make a post by Quick Replying Firefox sticks on a blank screen saying "waiting for site..." before eventually timing out. If I click Stop and go back to the thread, then refresh it, my post is there.

Any idea why this is happening?

This has been an ongoing problem, reported weekly if not more, in the Timing Out thread:

http://www.flyertalk.com/forum/showthread.php?t=775117