&quot;Firefox&quot; is a much better known brand than &quot;Mozilla&quot;.<p>Mozilla are not only using the &quot;Firefox&quot; 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). &quot;Made by the same people who make Firefox&quot; 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.<p>And if Mozilla ever want to include a content-blocker in Firefox proper, well, they already have a name for it.