It looks like the primary redeeming tab groups feature could've been implemented as a browser extension which I personally still wouldn't use as I don't see that it adds any value over my current natural setup of having my "tab groups" basically grouped across across multiple browser windows and virtual desktops. So all sites I frequent are already open and I just use the OS shortcuts for opening the preferred browser window and CTRL+NUM to navigate tabs which IMO beats twiddling with a permanent sidebar that takes up valuable real-estate.

It seems like what sets this browser apart is it wanting to charge $15/mo for a platform restricted browser with a tiny featureset and no extensions? Even free, it'd be hard to justify why anyone would choose to use it over other indie browsers like Vivaldi and its history of constantly shipping novel features.

To justify charging any $$ would require providing some kind of premium hosting service like a secure VPN, but even that should be no more than $5/mo. $15 /mo would be more than I'm paying for any software, even more than my JetBrains All Products Pack subscription (with continuity discount) for which I'm currently making use of 11 of their best-in-class products - Unfortunately I don't see anything here to justify anywhere near $15 /mo. Although I really can't see myself ever paying a subscription to use a browser so I'm definitely not the target market.