Review for ThreadKey by Florian Volk
Rated 5 out of 5 stars
I like this add-on because sorting a folder's content by date or something different (obviously) breaks with the threaded view. Using this extension I can quickly restore my beloved threaded view without navigating through several sub-menues.
This review is for a previous version of the add-on (0.5).To create your own collections, you must have a Mozilla Add-ons account.