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Editorial Team
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Asked: 2026-06-15T10:51:43+00:00

Time ago I did a theme for Chrome using a web engine if I’m

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Time ago I did a theme for Chrome using a web engine if I’m not mistaken.

It always worked till Chrome upgraded to version 23. Now when I want to install the theme I get this error:

Could not load extension from ‘/extension_path/’. The ‘manifest_version’ key must be present and set to 2 (without quotes). See developer.chrome.com/extensions/manifestVersion.html for details.

I guess I have to open the manifest.json and edit the key value to 2? I really don’t know, never worked with it. How can I open the manifest?

If I have the extension installed and update to 23, it keeps working without any problem.

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1 Answer

  1. Editorial Team

    Check out Chrome’s documentation on Manifest Version. Find the manifest.json file in the extension’s folder and add 

    "manifest_version": 2,

    in there.

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