The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

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i didnt expect a human BOT to answer this question :D WELL like i said, EVEN CHROME HAS!! so, if i "reset" to factory settings, would i lose my ADDONS too?! o.O

ooh "Warning: When using the reset feature, the following items are either NOT SAVED or set to their defaults." not saved, eh i wont give a damn if the addons reset to their so called "defaults" BUT ... what about going to those sites TO feedback?! B|

Try Resetting Firefox. It is most likely that one of your add-ons if messing with Firefox, as I'm getting full encryption on Facebook. You can also manually create a new profile (Profile Manager - Create, remove or switch Firefox profiles) which is the same thing as a reset except it doesn't transfer your personal information over to the new profile.

your trick worked BUT i am perplexed by the mere fact that it was troublefree yesterday THE ONLY MUTUAL ADDONS (chrome & firefox) that i have are ad block+ and LAST PASS i reinstalled the world's fave adblocker BUT how come last pass is the buggering one :-O