Does a browser in a browser proxy actually improve privacy and security? or How reliable is a browser

OP here—thanks for all the insights! Sounds like browser in a browser proxies are more of a quick fix than a real solution.

Gonna test Tor + a VPN combo based on your suggestions. Anyone got tips for reducing lag with that setup?

Also, *Whoer.net* was a solid rec—my proxy was leaking way more than I thought. Yikes.