Welcome to SeaMonkey Add-ons.
Add extra features and styles to make SeaMonkey your own.Close
Simplicissime... Rated 4 out of 5 stars
This one is even simpler than any other solution for vertical tabs - and it keeps most of the others' problems: Still no full screen, no grouping according to native tab groups, etc.)
But at least, it features "no restart", which i appreciate a lot!
Keep going, Joshua! Mozilla needs people trying hard!