For what its worth, I have partially switched to ff 89 and will fully do so in 3 months time. I have 24 chrome profiles and consider myself to be power user.

I like the new ff design barring the tabs which is the main concern of the op. But you have to give ff the benefit that they are trying hard to keep everyone happy and improving things as they go. I like the fact that atleast with ff I browse in containers and use their password manager compared to other browser password manager. Android ff nightly is great and supports extensions.

Would I trust my password to chrome ? Would google allow ublock origin on android ? One only needs to think a bit more to answer these questions.