File path for override_update_url

[Rahul Raman]

I have a manifest v3 extension which is installed in the chromium browsers though profile(in mac) and scripts(in windows).
I am using override_update_url property in my profile.(no update_url in manifest.json).

Eg profile item for chromium browser's - 
<key>installation_mode</key>
<string>force_installed</string>
<key>update_url</key>
<string>file:///{/SomePath/}update.xml</string>
<key>override_update_url</key>
<true/>

The signed crx and .xml file is present locally on my system.
When the profile is installed for the first time, after restarting the browser the extension gets installed and is visible in the chrome://extension page.

If I replace the crx at that location with a new crx(with updated version in manifest.json) and wait for even 10-15 hours(although extension update cycle is ~5hrs in chromium browsers) the extension doesn't gets updated.

After replacing the crx if i simply restart my browser twice then the extension automatically gets updated.

What's the issue here ? The extension should automatically get updated in the 5hrs update cycle.
Is it because of the file:/// path ? If yes, then how after multiple restart its able to read the .xml and update the extension ?

[Patrick Kettner]

override_update_url is a boolean, not a string. You should be seeing that the policy has an invalid value if you go to chrome://policy. You can set a different server with the update_url attribute. But a file protocol handler is not supported, it must be http or https. Oliver created the extension update testing tool you can hack on to get this working locally.

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[Rahul Raman]

Yes as you can check in the sample profile i added i am giving boolean value only to "override_update_url",and the xml url in the update url field.

So the flow is like this - 
I install the Profile.
I install an application App1 on MAC which puts in the crx and xml at a specific location in the system.(the file:/// path given in the profile).
On browser restart the extension gets installed in the browser.
I update App1 and so the crx and xml also gets updated in the system.

Now in the next extension update cycle(~5hrs) my extension doesn't gets updated on its own. So the issue is the file protocol handler ? 
If i will host these xml and crx somewhere else then the auto update will happen ?

[Patrick Kettner]

Apologies, I misread the xml

Yes, if you host the xml file from an HTTP source, then the updates will occur.