How To Change Firefox Language Using Quick Locale Switcher

Maybe a category of firefox users faced the language problems , maybe you understand english and the language of firefox is spanish so it will be hard to keep using firefox and maybe you found some programs to change the language or something other that i don't know .


Now you will stay away from this intractable problem and you will use a easy solution , is adding an Add-ons named Quick Locale Switcher after adding it you will change the language like you want and quickly .