@#Anakin mistakenly posted in another add-on discussion group, meaning to post here. His question was about Brave browser and it not being detected. I'll answer here in the properly discussion.
Brave is LESS THAN 1% of the browser market, so it's not something I'm interested in troubleshooting.
For transparency:
I'm not going to install every browser and extension. It's exhausting and way too time consuming. Chrome is 66%, Safari is 20%, Edge is 5%+. That's enough.
My attempts for detection and updates focused on what's most common.
There will always be ways for more tech savvy patrons to circumvent almost anything on the internet, including adblock, that's just the fact when we're in an "open" tech environment.
Performance:
With that said, the latest build is approximately 97% when using the most common browsers/extensions, which is 90%+ of real visitors. That's 87% by my estimation.