webextensions-examples/eslint-example/manifest.json

{
    "manifest_version": 2,
    "description": "Example using eslint",
    "name": "eslint-example",
    "version": "1.0",
    "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/eslint-example",

    "browser_action": {
        "default_icon": "icons/page-32.png",
        "default_popup": "popup.html"
    }
}