40% of users don't use any extensions at all. Of the remaining 60%, the vast majority only use an ad blocker. Of the extensions specifically mentioned in the

40% of users don't use any extensions at all. Of the remaining 60%, the vast majority only use an ad blocker. Of the extensions specifically mentioned in the petition, they have 113,898 users, 111,846 users, 29,940 users, and 1,371 users respectively. Even assuming that all of those are unique users, that's 257,055 users which is a very small percentage of the hundreds of millions of Firefox users. XUL was consistently the cause of most Firefox crashes and issues and maintenance of it was slowing down overall development.