FireFox's FireBug sometimes cause double postbacks

FireBug's double postback bug

"Thanks for the great responses here. In my case it turn out to be FireBug (version 1.05) with FireFox 2.0.0.20. Once I switched off the FireBug Add-in, the double posts stopped."

http://forums.mozillazine.org/viewtopic.php?p=3022038

http://stackoverflow.com/questions/283011/firefox-sending-request-twice