I was sorry to hear about the Mozilla team's decision. In my opinion, this is the best of the cache clearing extensions. Clears cache and reloads, *and* gives you a message so you feel confident that it was really done -- all in one click. I don't think that any of the others do that.
I've been working on a web site this week, and this add-on has saved me a lot of time and bother. Thank you for maintaining it.
I use this constantly. Be it a web dev or netadmin, Firefox aggressively caches and can make you crazy as you develop content or have a lot of DNS changes. This makes it so easy to just get things working again.