I looked at google-chrome-extension labs page and I see no example where you can use different content scripts for different sites. They have a page showing how to have multiple content scripts on the same site, but not vice versa. Is there a way to have different content scenarios for different sites?
{ "name": "My extension", ... "content_scripts": [ { "matches": ["http://www.google.com/*"], "js": ["script1.js"] },{ "matches": ["http://www.yahoo.com/*"], "js": ["script2.js"] } ], ... }