Just set up Manjaro on a couple PCs and I realized that some of the most fun is browsing all the great packages and setting up a PC to meet as many forseeable needs I can. I want to list some of the things to do after install, housekeeping and additional apps to get.
In the software updater, click the right side hamburger menu and preferences. From there open the tabs for the AUR, Snap and Flatpack and enable those app repos.
Get the brave browser from the software center.
Open terminal.
Firewall is a pre-installed app on Manjaro that allows us to configure the network firewall. Open the app and toggle Status checkbox to activate it.
Redshift is a Linux application for protecting your eyes by reducing the amount of blue light at night.
Open Pamac → Search for redshift → Build → Apply.