You can, depending on which precise bar is meant.

I mean it’s source available, but sure I guess

I was on your side until this message.

Zen seems to have picked up a lot of privacy improvements but it’s a pretty small team doing a lot of ambitious work. I like it, but it’s got a lot of (minor, mostly aesthetic) bugs.

I use mullvad for stuff I really don’t want a record of (for as much as that’s possible)

On the chrome side, Vivaldi (former opera before they sold out to china) is a good browser, but even more ambitious and even more buggy than zen. It has a built in email client. Like, who does that?