[GreenWatermelon]

Hell despite missing tab groups, Zen browser is the only browser that finally had a "good enough" vertical tabs implementation, which allowed me to finally drop Edge as my main browser.

[MrAlex94]

I'd be curious for your comparison to Waterfox, which added vertical tab integration a while ago.

[dotancohen]

What do you not like about Firefox's Tree Style Tabs? I might be open to an alternative.

[GreenWatermelon]

I Cant't hide the tab bar without some userProfile.css hacks, while in Zen it has first class support.

It's more a matter of saving precious vertical space.

[dotancohen]

I see. Yes, I already hid the stock tab bar years ago and forgot about it.