Rated 5 out of 5 stars

This is an awesome addon! I've been using it for a couple of years now on Firefox/Ubuntu & Iceweasel/Debian without any (serious) problems. The export/sync feature is a major plus.
I'm confident the issue with "sync" in 2.1 will be addressed quickly.
Keep up the (wonderful) work.

This review is for a previous version of the add-on (2.1.1-signed).