Too bad they removed the ability to open the vertical tabs side bar on hover, that was a critical feature that caused me to go back to Firefox proper. I'll go back to Zen once they add it but to be honest, I'm not too sure what extra value Zen would bring me.

I was disappointed that they removed that from the settings menu, but it is still available as a 'zen mod'.

it's still here the 'left bar on hoover feature', it's just with another name

I am talking about this feature [0], it should have the option to show all the tab icons and expand on hover, not hide the side bar entirely. The creator said this was being dropped due to maintenance concerns, and I haven't seen a community solution like they said yet.

[0] https://www.reddit.com/r/zen_browser/s/FaQ8Ro6d8r

Well, that feature seems to be showcased on their marketing landing page, so they may want to address that.