i having these hanging problem from a a year before it hangs in middle and after a min it gets normal but now it hangs up @startup and if i browse long in safe mode i get same problem there and then i have to closs it via taskbar I think Foxtab is the problem but i removed still i am facing same problems.
Re: Firefox hangs(not responding) Problem from a year
Please try the Reset Firefox feature via Help (Alt + H) > Troubleshooting Information. If the problem persists you can also try to set No Proxy in Tools (Alt + T) > Options > Advanced > Network > Settings. You can also try to Disable Charles in Tools (Alt + T) > Add-ons > Extensions, or Plugins in the newly reset profile if it is installed by default.
(To revert to the previous profile you were using, close the new profile (i.e. exit Firefox), start Firefox and choose the Default User profile. While the Profile Manager is open, you can also delete the newly reset profile (the one containing random numbers), or the former profile, as the case may be). If the reset is okay, it would be a good idea to delete the old profile as otherwise it would be left intact with the previous data/cache until deleted.