"Firefox" is a much better known brand than "Mozilla".
Mozilla are not only using the "Firefox" brand for a single application, but also for other solutions which are related to Web browsing in one way or another (e.g. Firefox OS). "Made by the same people who make Firefox" is a great presentation card. You can not expect people to have intricate knowledge of the IT sector before deciding if one add-on is trustworthy or not.
And if Mozilla ever want to include a content-blocker in Firefox proper, well, they already have a name for it.
Mozilla are not only using the "Firefox" brand for a single application, but also for other solutions which are related to Web browsing in one way or another (e.g. Firefox OS). "Made by the same people who make Firefox" is a great presentation card. You can not expect people to have intricate knowledge of the IT sector before deciding if one add-on is trustworthy or not.
And if Mozilla ever want to include a content-blocker in Firefox proper, well, they already have a name for it.