Custom roms do improve security of an EOL device, though you’re missing out the vendor security patches which aren’t open source. You can read this discussion here.
One thing I just noticed is the privacy policy. It proxies the data to their server and can collect analytics. I do understand it’s to circumvent CORS, but still we’ve to keep that in mind.
It has! Check appearance in settings.
Brave search works well.
Does brave index data on it’s own or is it pulled from Google/Bing?
for now…