Rated 3 out of 5 stars

Good: Moveable placement, good size.

Bad: PR number is hard to read (should be a thinner font), pagerank sometimes doesn't update when switching between tabs.

I'd suggest making the addon look just like the one you've made for Chrome. Great job with that one.

This review is for a previous version of the add-on (1.3). 

Thanks for such detailed review. Fixed the bug for switching between tabs. Suggest a good font to show pagerank number. Please try the addon again and give me your feedback. Thanks