From my experience Netshield is better than nothing but not better than uBO, I use the two in combination with each other. This helps not only because they can compliment each other but Netshield also blocks ads device wide where uBO is only within FF. It also helps encrypt your DNS queries within the VPN tunnel if that’s something your threat model calls for. My only complaints are the block lists Proton uses aren’t known to anyone so who knows what they use. You also can’t see what is and what isn’t being blocked and last time I checked the protonmail app connects to google firebase, so would ProtonVPNs Netshield block that if Protonmail uses it? I’m not sure. If you want something where you can manual select blocklists and see the queries being made use NextDNS.
Its on their roadmap and it says import should be coming this month so it’s not too long of a wait.
I use profiles for different extension needs. Like a YouTube profile with sponserblock.
I lost interest in them after they had their beef with GrapheneOS and stopped recommending them. I get it, they hate the old lead dev cause he was a jerk but how are you going to spread the word of privacy and not recommend the most superior OS in privacy and security? If you truly want to help people achieve the best results with their privacy and security then you should be unbiased with your recommendations. They are doing the privacy space and all the new people looking for advice a disservice because they hold a grudge. Now they’re taking free trips to review products? Sounds like they’re using their subscription count to spread their own agenda.