Acestream links are often shared on unofficial streaming sites (sports, PPV events, movies). These streams are frequently unauthorized. Additionally, because Acestream is P2P:
How to Stream Like a Pro: The Truth About Acestream Chrome Extensions acestream chrome extension
Installing and using the AceStream Chrome extension is straightforward: Acestream links are often shared on unofficial streaming
"type": "start_stream", "content_id": "SOME_CONTENT_ID" acestream chrome extension
Because AceStream uses P2P technology, your IP address is visible to everyone in the swarm.