looks nice but a text on not active tab is barely readable, so you have to switch to tab to read its title

Would've been a great theme is the image was clear, currently it looks like a heavily compressed JPEG file. Seconded @alem's observation about the address bar being illegible unless selected, although I agree that it's not an issue most of the time. I'm not a fan of the translucent menus/dialog boxes though that might be personal preference.