How to detect the installed Chrome version?

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Get major version of Chrome as an integer:

function getChromeVersion () {     
    var raw = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);

    return raw ? parseInt(raw[2], 10) : false;
}

I’ve updated the original answer, so that it does not throw an exception in other browsers, and does not use deprecated features.

You can also set minimum_chrome_version in the manifest to not let users with older versions install it.

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