If you are trying to open a URL in Firefox but it is into long loading cycle and eventually stops responding, then you can try solution given here.
This issue can be caused by corrupt cookies or cache. In order to try to fix this problem clear both cookies and the cache.
Note: This will temporarily log you out of all sites you’re logged in to.
To clear cache and cookies do the following:
1.Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools/History > Clear recent history.
2.Under “Time range to clear”, select “Today” (if the problem you are facing today only).
3.Now, click the arrow next to Details to toggle the Details list active.
4.From the details list, check Cache and Cookies and uncheck everything else.
5.Now click the Clear now button.
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