I suggest using an RSS reader that supports advanced filters. There are many other benefits to RSS even without that, for example not having to rescan over links you've already read or, worse, never going to click.

As far as I know, there isn't a great solution for filtering out links on all pages. You could add sites to uBlock Origin, but you still have to click the link before you figure out it's a blacklisted site. I made a FF plugin for myself that hides links to sites I don't care to ever visit. Technically, it applies css to elements matching regular expressions. So far I've only used it to apply "visibility: hidden" to elements containing a small, but growing, list of domains. It's not perfect, it's not even really good, but I've been happy with it for a few years. If you're interested in trying it, I had to publish it to Add-on page to make it usable (I hate that Mozilla doesn't let us conveniently run any add-on from a local code base), it's called "ssure". It recently started working on FF mobile too, but it's a bit of a pain to configure there.

especially paywalled links to sources such as WSJ