Just a +1

> Do you find the sliding that still happens annoying? 

Yes.

> considering making this "keep in same order" functionality optional

My vote up for this!

I heard that for popular Firefox addons roughly every eightieth user donate something, is this true for Chrome?

Yeh, also wait a lot for sources ;) Have several excellent ideas. Open Source is a great thing! Power to the users! I hope donations will cover all the sweat. Or maybe they already do this?