Facebook users will soon be able to keep certain topics from appearing in their timelines. The social network announced a new feature yesterday called "keyword snooze" that will remove specific words from news feeds and groups for up to 30 days. Facebook is currently testing it out with a small percentage of users, and will make it available to everyone at a later time. The network already allows people to snooze other users, groups and pages with another feature that rolled out in December.