[unwantedLetters]

He pointed out why that might not be possible. If an add-on is only supposed to work from version 3.6-6.0, and Firefox silently updates to 7, the user loses the add-on's functionality (and for many people, the only reason to use firefox are the add-ons)

[modeless]

When an add-on is disabled some sort of notification is desirable, but it doesn't have to come in the form of a modal dialog that blocks usage of the browser. There's generally nothing a user can do about it anyway. Furthermore, Mozilla could be doing a much better job of compatibility testing for the most popular extensions to ensure they don't have to be disabled every upgrade.

[fauziassegaff]

Agree with the comment "The only reason to use firefox are the add-ons"

the safari performance and it's new fancy features looks more promising, but those add-ons on firefox is the one that hard to beat