In about:config you can enable or disable features individually.
Recently they added ":modal" that will make paywalls harder to bypass. Most sites haven't implement yet, but I've already disabled this "feature" on config.
Every once and a while I have a look at the changelog of the FF dev. It is good way to find the flags to disable features and to have an idea how the web is changing overall.
The downside of cherry picking features is that your browser fingerprint becames pretty much unique.