

It’s not enabled by default. I too just learned about this recently.
Edit:
On the topic of uBlock Origin, you can also use it to filter out content on the web version of Lemmy since it doesn’t have a native keyword filtering feature. Just add to “my filters” and swap in your own instance.
For comments:
feddit.uk##article.comment-node:has(div.comment-content:has(p:has-text(/elon/i)))
For posts:
feddit.uk##div.post-listing:has(span:has-text(/elon/i))
For urls:
feddit.uk##div.post-listing:has(a[href*="elon.com"])


I have quite the extensive list I’ve been building over the past few years and so far my record is only 3 posts visible on the frontpage. Most of the time it’s nowhere that bad though, but I do notice that it’s putting in a lot of work.