Better protection of private tabs
Currently you can protect private tabs with face id, which is more convenient but can be less secure as it happens automagically
Instead it would be great to have an option to use a short alphanumeric password to unlock (or as an extra option - just a PIN so you would get only a numpad for easier entry). Brave browser used to have this feature, but they also caved in to the face id convenience gods
For uber security benefits you can have multiple private tabs which would only open for a given password, so you can even have the awesome advanced feature of plausible deniability when you unlock a “private” set of tabs with a password while keeping your real private set of tabs behind a different password