A little more of customization freedom.

We could use more customization options, like:
→ Hide anything Nitro (some people can't afford it or may not want to see any Nitro promotion)
→ Change server icon size (between small (1/2 current size), normal (current), large (2x current size)
→ Custom Notification sounds (It's 2020, FFS! Even phones have been allowing customization of those for aeons)
→ The ability to create UserChrome.CSS and UserContent.CSS for more advanced customization without requiring third party modifications.