It's Been A Horrible Day - Tumblr Posts

Someone here would know this and can just tell me... I kept seeing Tumblr posts about how Chrome is horrible, so switched to Firefox, and that actually went pretty smoothly, it imported all my bookmarks and such.

Only I had to reinstall XKit for Tumblr on Firefox, and it no longer seems to have Blacklist, which was the main functionality I used. Are there different XKits? How do I find the one with Blacklist?