Hello, I use Linux operating system and ever since updating Firefox to version 21, when I start the browser, about two minutes pass while at a fully downloaded webpage, my dial-up modem starts blinking, which means someone is pinging. I launched netstat in terminal, and output shows the following: Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 4.225.171.252:45590 bud02s04-in-f0.1e1:http ESTABLISHED tcp 0 0 4.225.171.252:40365 sof01s02-in-f8.1e1:http TIME_WAIT tcp 0 0 4.225.171.252:60565 bud02s04-in-f3.1e1:http TIME_WAIT tcp 0 0 4.225.171.252:33067 OCSP.TKO2.VERISIGN:http TIME_WAIT tcp 0 0 4.225.171.252:60566 bud02s04-in-f3.1e1:http TIME_WAIT tcp 0 0 4.225.171.252:37801 sof01s02-in-f4.1e1:http ESTABLISHED Another one I see in the output is https : //addons-star-net.zlb.phx.mozilla.net with other output. It's annoying because it slows my connection down, and usally lasts about 5 minutes. So, I disconnect as at first I had no idea who was pinging my connection as I do not have anything running that would automatically ping a server. I've disabled automatic update for search engines, do not have the Health Report ticked, and no spell checker ticked. I have all my extensions disabled, and removed the two addons (ghostery and self-destructing cookies) I did have just to see if this would stop the autopinging of Firefox 21. It didn't. Thanks for your time.