Topbar and Firefox-dev questions

How to make a topbar like these in Manjaro KDE? Clock/CPU/RAM/Applications/Network and so on…

  1. I installed firefox-developer edition and uninstalled firefox. But I want to type firefox to start it (as firefox-developer edition is too long). How should I do?

Hope that Plasma 5.21 is coming soon on Manjaro!

For firefox you could add an alias in ~/.bashrc