I use uMatrix https://github.com/gorhill/uMatrix
which allows me to filter content in a point & click fashion. For example, in the first screenshot attached I'm allowing all first party content on the domain lainchan.org, and this setting is saved (see the lock button). In the second, for all sites sites that I don't have settings for, I only allow CSS and images.
From my understanding, the main reason the Tor project recommends against installing additional addons is because you can't be assured that the addon is being routed through Tor if it makes requests (such as to update). This isn't incredibly important for me, so I install addons anyway. Set xpinstall.signatures.required to false in about:config to do so.
You can do a lot of things with uMatrix, so check it out. The screenshots are only a simple demonstration.