This is a great extension - I finally had to find a similar extension to BarTab that I used to use before the webextension thingy when my laptop with 20GiB finally used up all the RAM, most of the swap space and slowed my system to crawl until I could free some of it... After installing this the memory use has dropped to a fraction of what it used to be. I started with the default settings, then after most my tabs were discarded I set the time before tabs get auto-discarded to much higher.

One request I have - if possible, could you make this extension to work with TST (Tree Style Tab) extension, so that if it detects TST it will show discarded tabs like it does on regular tab bar (which I've hidden because it's kinda redundant with TST)? That would be most awesome! Also you could add TST-specific features, such as "discard this tab tree", etc.
I would definitely add a star to my review for that! =)