When you install Blacklist, refresh Facebook-
you'll find the options under the right-hand sidebar on the home page.
Add the words you want to blacklist as a comma-separated list.
You can also choose to hide the Trending stories in your sidebar, only
blacklist posts which also contain a "cw" or "tw", or hide
the blacklisted words from showing up in the "post hidden" notification.
Extensions for Safari and Firefox are coming soon.
1. These stand for "content warning" and "trigger warning",
respectively. Some Facebook groups use these, but if your friends don't,
don't worry about it.