Earlier quoted context omitted.
You should check out uMatrix to get even more fine grained control over sites. I usually allow images on every page, that's it. Some need CSS, some need iframes, and a small subset of websites I visit are actual webapps that need javascript.
I love uMatrix but development on it has stopped so it won't receive bug fixes and it will probably stop working someday. I don't think I would recommend new users start using it. https://github.com/gorhill/uMatrix https://news.ycombinator.com/item?id=24532973
I want to switch to uBlock's Advanced mode which seems to do similar things, but I haven't yet.