Examine source code of Suspend Me

{
  "manifest_version": 3,
  "name": "Suspend Me",
  "description": "Suspends all open tabs (except pinned tabs) at the click of a button. This unloads the pages from RAM and stops them from running in the background.",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "suspend-me@cursedbit.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "icons/recycle-32.png",
    "64": "icons/recycle-64.png"
  },
  "action": {
    "theme_icons": [
      {
        "dark": "icons/recycle-32.png",
        "light": "icons/recycle-white-32.png",
        "size": 32
      },
      {
        "dark": "icons/recycle-64.png",
        "light": "icons/recycle-white-64.png",
        "size": 64
      }
    ]
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}