I am developing an extension for Google Chrome. I need to check every time(at the time of installation) whether this extension is already installed ?. I am looking for a help...
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possible duplicate of [Check whether user has my chrome extension installed](http://stackoverflow.com/questions/6293498/check-whether-user-has-my-chrome-extension-installed) – Rob W Jun 20 '12 at 13:11
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Use the connection methods found here:
Untested method
var myPort=chrome.extension.connect('yourextensionid_qwerqweroijwefoijwef', some_object_to_send_on_connect);
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