So, bucking the trend... but i think this is really well executed and I'm a huge fan. I don't use vivaldi but i dont find it to be as nice of a UX as this.

Im a Firefox guy mostly on principal, but if you had a solid free trial on this I would give it a go.

Best of luck to you, remember you don't need to do something totally new to do it in a way that makes peoples lives better.

I'd consider dropping the prices a bit, $9/mo seems more reasonable to me than $15 but as you add features im sure that will change.