One example of the move towards being more closed is that addons on the catalog used to be reviewed by volunteers: https://wiki.mozilla.org/index.php?title=Add-

One example of the move towards being more closed is that addons on the catalog used to be reviewed by volunteers: https://wiki.mozilla.org/index.php?title=Add-ons%2FReviewers&type=revision&diff=1238919&oldid=1223872 https://wiki.mozilla.org/index.php?title=Add-ons%2FReviewers... I don't know how well it worked in practice but it sounded like it was a cool way to engage the community.