Developer reply by Jonathan Kamens
Rated 4 out of 5 stars
Excellent add-on but still not working right at TB start: I need to re-install it every time TB is started to actually see the arrows
This review is for a previous version of the add-on (4.0.2).We're aware of the issue and we're working on a fix. I am sorry about the trouble.
To create your own collections, you must have a Mozilla Add-ons account.