Sometimes after a few hours of browsing, some tabs in Mozilla will keep loading forever, every attempt to refresh or retrying to open new tabs also fail. However, when I opening the new tabs beside the tab that loading forever, the tab will loading just fine. After I try to Open in new tab for several times, the dead tabs that forever loading will create a pattern of 1 dead tab with 7 or 8 Tabs that load just fine without error. It also happened in the safe mode too. Every attempt from clean reinstall also didn't fix the problem. Is this a mozilla bug, is there a fix to this bug? Thank you very much, and sorry for my bad english...