Adaptable Ali: Thats why i dont like Firefox. It 'gives" you so many "surprises" you havent asked for / need. Happens many times that you get a message "Firefox is uploading blah blah blah and will start in a few minutes".
Not to mention problems like yours with a frozen screen :( No i prefer a reliable browser as Internet Explorer.
Those who like new "toys" can play with Firefox LOL