[bubblethink]

How would there be any grounds for a lawsuit ? The browser is free to implement whatever set of features it wants. Not trusting a specific CA is just a feature (or a bug), whichever way you look at it. A CA is just providing a service on the web. A service can't sue a browser for not supporting the service. Symantec is free to create its own browser that trusts its CA.

[otterley]

I could see a cause of action based on a libel theory or tortious interference with business affairs. Not sure it'd prevail, but there's possibly a prima facie case there.

[tankenmate]

The question is, was there a contract signed? A verbal contract? Is there an implied contract? Tortious interference?

[dadrian]

Antitrust