Chrome vs Firefox

Its depends on you if you're on mobile then i won't suggest chrome because it doesn't support addon so your phone may get virus from chrome bad ads. Firefox good choice because it support addons

if you're on PC/Laptop uses depends on you if you're web developer then don't use Firefox because when i was working on Code Sandbox Firefox was using high ram so my mostly ram was used by firefox because of that my system was getting slower and frozen so no good experience.

I faced Chrome virus on Windows after that never installed it

Microsoft Edge used chrome so can use both Microsoft or Chrome Store :D
if you want to install Microsoft Edge then you need free disk space above 1Gb otherwise it will cry no disk space even installation size is 500mb or less