Rated 4 out of 5 stars
I love this extension and use it every day! I keep lots of tabs always opened, so it's manna from Heaven for me!
Anyway, I'd like the possibility to choose - directly from the Tools menu or from the Tools -> Add-ons -> SaveMemory Option button - if showing the "Pause button" when moving the cursor on a tab icon. This is very annoying - especially when that page uses AJAX to show its content - because it often happens to inadvertently pause a tab.
I'm also waiting for a Firefox 4-compatible version of SaveMemory.