Observations:
1) Catalina worked much cooler when I did a clean install and migrated.
2) Microsoft Edge is pretty performant, but I'd only recommend Chrome if you have a Google account.
Edge gets the job done but it performs better on Windows (which I guess is to be expected).
I have Brave as the default browser on my iPads and iPhones - I like it that much. I would use Firefox if it wasn't the webkit version of Firefox and if I could add the Ublock Origin. So overall, I don't use Safari.