hurtleg

Whooaaa!!! Thanks guys!! But I have found the main cause here, it's not about malware but it's one of my Extensions. I've External IP in my extension and since I've upgraded the latest Firefox it start giving those login prompt. Now I have disabled the extension and problem solved, no more pop-ups. Thank You!! :thumbup

Ok, I have reset it to Default but it still occurring. I have chosen and tested both "Show my homepage" and "Show a blank page" option yet the pop-up still keep coming. Right now the only solution is to restart Firefox 1-2 times

Hello, I'm using Firefox as my browser and just recently it gives me unexpected pop-up message especially during the browser's startup. Screenshot: When I click Cancel, Firefox would just turn itself off and I have to restart it again. Sometimes it went well (after restart) but sometimes the pop-up shows up again. At first I thought my PC have been infected by malware but I scanned it with AdAware, Spybot S&D, HijackThis and AVG but the results are clean. I'm not a tech savvy, and I'm not very good with English either, but I really appreciate if I could some help here. Thanks