Rated 5 out of 5 stars

Από τον/την Hueristic στις Μάρτιος 10, 2015 · μόνιμος σύνδεσμος

suddenly it no longer appears in my toolbar or in my tools menu.

OK had to go into advanced and uncheck the options to display and apply and then check them again and apply and then close and reopen browser. Maybe a FF fault?