[larntz]

It's not an api, but just in case people don't know... It is possible to hide the horizontal tabs via userChrome.

https://github.com/piroor/treestyletab/wiki/Code-snippets-fo...

[wkat4242]

Hmm but I don't want to use vertical tabs in every window. Only some of them, in the others (with few tabs and narrower 4:3 displays) i want horizontal. If I hide it in userchrome I end up with no tab bar in those cases.