I'm probably late to this particular game, but the Disable JavaScript extension for Firefox is terrific.
It saves your preference per-site, and disabling JS instantly vanquishes paywalls, "subscribe to our newsletter" popups, and many other kinds of intrusive, worthless garbage.
@ieure
If you don't have it, install the ublock origin extension. It makes it easy to disable JavaScript quickly and on a per-site basis.
@Demosthenes I have it; the web wold be intolerable without an ad blocker. But I didn't know it could also block JS per-site.
