Refreshing Your Original Firefox Installation

Sometimes firefox becomes gives me nasty errors or some of my usefull extentions stop working (mostly because of installing a bad extensions which blow the firefox up) , and it gives me "chrome" error, I reinstall the extension and even I reinstall the firefox itself , but still wont work !

what's the problem and what to do ? the problem is there is a folder under your comptuer which stores Firefox datas and when you un-install or reinstall Firefox , it doesn't delete that folder and the new Firefox will use that folder too which has the error in it .

the solution is to delete the "Firefo"x folder under ".mozilla" folder in your home directory .

1- in ubuntu , go to your home directory
2- and press ctrl+h to see Hidden folders
3- then you will see .mozilla folder go there
4- there is a Firefox folder there, just delete the Firefox folder
5- now reinstall firefox and you will have firefox working like first day


(I believe in windows you should do the same, except in windows the folder should bein Documents under application data )