The Supreme Court will convene for a rare oral argument session on Friday to consider a set of landmark cases that could permanently alter the way millions of people consume online content.

TikTok, the video-based social media app used by more than 160 million people in the United States, faces an ultimatum to divest from its China-based parent company ByteDance or face a permanent U.S. ban, thanks to a bipartisan national security law signed by President Joe Biden. The law is set to take effect on Jan. 19, leading legal experts to believe the justices will have fewer than nine days to turn around a decision.