Hello everyones, My firefox on my ubuntu give me to "bug" : first "The bookmarks and history system will not be functionnal..." second, when i try to sync sign up : "error 500" What i have try, "rm -rf .mozilla .cache/mozilla" i have download latest version and execute "firefox-bin" i have try to chmod 777 all this folders and under folders... i'm working on it from three hours and have read many solution on firefox support or others website, no one works... So can you help me ?