Zorin OS has a software management GUI, & Firefox is in there, but it got black flagged on the last lap of installation & didn't say *why* it failed. Instead, it said the three most useless words that only the laziest, most user-hostile programmers think a program should say: "Something went wrong."
Less than 30 minutes with this Linux distro, & it somehow made Linux look worse than Windows 8 RTM.
Outstanding!
Stop using Brave Browser: https://www.spacebar.news/stop-using-brave-browser/