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I'm trying to setup group policy for Google Chrome ( particularily I'm working on setting up the Configuring the list of force-installed extensions. I can find the extension ID by looking in tools-extensions in Google Chrome but I cannot find the update URL for extensions like Adblock or Google Mail Checker, where would I find these?

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up vote 5 down vote accepted

I can't help you with group-policy, but each extension includes its update URL in manifest.json.

So, for the current version of adblock (id: gighmmpiobklfepjocnamgkkbiglidom):

%USERPROFILE%\AppData\Local\Google\Chrome\User Data\Default\Extensions\gighmmpiobklfepjocnamgkkbiglidom\2.5.14_0\manifest.json


"update_url": ""

The extension will query that URL for updates, as per the documentation.

We can therefore construct a URL that will return the update XML from the above URL (just change the ID as needed) - for adblock:

The XML that is returned reads:

<?xml version="1.0" encoding="UTF-8"?>
<gupdate xmlns="" protocol="2.0" server="prod">
    <daystart elapsed_seconds="49387"/>
    <app appid="gighmmpiobklfepjocnamgkkbiglidom" status="ok">
        <updatecheck codebase="" hash="" size="529317" status="ok" version="2.5.14"/>

We are interested in the codebase attribute of updatecheck, which provides us the direct URL to the latest CRX file.

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The above worked except for acquiring the .crx file. I was, however, able to download using this site:

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