I want my mail client to only have one tab, if i switch to another view, i can go back there by normally opening it again. Sure, some people will see this differently, so i think it would be good, to have an option to disable tabs.
Please add Firefox to the macOS AppStore for two reasons.1. It's more convinient to install and update the app (until now you need to be admin to update firefox).2. The AppStore is a trusted source, so more people are willing to install firefox.