Examine source code of Window Resizer

{
  "manifest_version": 3,
  "version": "0.2.8",
  "name": "Window Resizer",
  "description": "__MSG_description__",
  "default_locale": "en",
  "permissions": [
    "storage",
    "system.display"
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "action": {
    "default_popup": "data/popup/index.html"
  },
  "homepage_url": "https://webextension.org/listing/window-resizer.html",
  "background": {
    "service_worker": "worker.js",
    "scripts": [
      "polyfill.js",
      "worker.js"
    ]
  },
  "commands": {
    "_execute_action": {
      "description": "Press the action button"
    },
    "layout-0": {
      "description": "Use the first popup alignment to adjust the current window size"
    },
    "layout-1": {
      "description": "Use the second popup alignment to adjust the current window size"
    },
    "layout-2": {
      "description": "Use the third popup alignment to adjust the current window size"
    },
    "layout-3": {
      "description": "Use the forth popup alignment to adjust the current window size"
    },
    "layout-4": {
      "description": "Use the fifth popup alignment to adjust the current window size"
    }
  },
  "options_ui": {
    "page": "/data/options/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c7eb9f55-8689-4b04-ae7c-2893920275c3}",
      "strict_min_version": "148.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}