Key takeawaysThe Ninth Circuit vacated Amazon's preliminary injunction against Perplexity's Comet browser on August 4, 2026, ruling Amazon is unlikely to prove Perplexity "accessed" its servers under the CFAA because users, not Perplexity, operate the tool. The Ninth Circuit Court of Appeals vacated the preliminary injunction Amazon had secured against Perplexity AI's Comet browser, per the court's opinion in No. The Ninth Circuit stayed that order pending appeal, heard oral arguments in Seattle on June 11, 2026, and has now vacated the injunction entirely. The Ninth Circuit is the most influential circuit for tech law and covers California, where nearly every major platform company is domiciled. Incumbents and regulators hunting for a legal theory to leash open-source developers now have a harder road in the Ninth Circuit.