overidin the manifest.json not working?

I need permissions to be able to do scripting(in a background service worker), I tried to override my manifest.json. I searched it up and the documentation said adding to the package.json. However, when I do that, it still does nto change the manifest so I dont have permission cause when I log the manifest.json in the background serve worker, it only has premission to open side tab. This is my repo: https://github.com/ThePathOfLeastResistance/checkment

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