I interpret this as you switching from an browser by a relatively small organization that has certainly made some mistakes but is backing down with a relatively small amount of user feedback to one by a much larger organization that has less motivation to acquiesce to users' desires and less motivation to respect users' privacy.

Also, as others pointed out, this sentence you quote (probably) isn't as bad as your interpretation (I think I interpreted as you did, too, on first read). If you want an easter egg in your browser, and you install an add-on to get it, what's bad about that? The interpretation that "add-on" means "installed by default by Mozilla" seems off compared to what was said elsewhere here (though as it happens, this add-on was installed by default, hence the interpretation that this was okay... but read on, and clearly callahad is saying that it wasn't okay to install by default).

I think the statement is poorly worded, but with the larger context, I'll give Mozilla a chance here... or else I'll use a browser that I think is more privacy conscious and that is more likely to listen to its users, not a browser that I think is less privacy conscious and less likely to listen to its users.