After a lot of discussion i think I'll totally shift to Chromium based Browsers (on android side not desktop)
I was using both gecko and chromium Browsers on my phone.
So I need some suggestion to choose a chromium Browser . It should be open source and privacy respecting.
Any recommendations ??
Regardless, most of those VPN-based ad blockers are just using their own flavor and combination of block lists. I'm sure some get a little fancier, but that's gist of it. Which is something, that ProtonVPN also offers I think they call it netshield or something like that.
Check your proton VPN app, and look for the netshield setting. If it's enabled, you are using VPN based ad blockers, but if it's not enabled, you should turn it on.
You should enable it anyways. A lot apps, especially from big companies like banks, use DNS based telemetry and tracking services. Many of which will then be blocked by netshield, if it's enabled.