(By “tabs” I thought you meant Firefox tabs rather than tab characters!)
Do you get the same problem if you run Firefox in Safe Mode?
Safe Mode http://support.mozilla.com/kb/Safe+Mode
Quit Firefox entirely (Ctrl+Q) and run (Alt+F2):
firefox -safe-mode
(By “tabs” I thought you meant Firefox tabs rather than tab characters!)
Do you get the same problem if you run Firefox in Safe Mode?
Safe Mode support. mozilla. com/kb/ Safe+Mode
http://
Quit Firefox entirely (Ctrl+Q) and run (Alt+F2):
firefox -safe-mode