It's really very outsated in terms of modern browser features and options. It's really an incredibly minimalist version of Firefox that looks like it could have come out of the Netscape era. My main gripe is lack of DoH support.
Having said that, I keep it installed when I need a webpage to work that will load every It's meant to and will filter out nothing. It works, but you'll quickly be missing a lot of the more modern features & conviences quickly.
They have also had an ongoing problem with Cloudflare hosted pages outright blocking PM. I haven't kept up with how that's going.