Examine source code of Archive Redirect

{
  "manifest_version": 2,
  "name": "Archive Redirect",
  "description": "Redirect current tab to archive.is or archive.org.",
  "version": "1.1",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Archive current page"
  },
  "commands": {
    "archive-is": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Redirect to archive.is"
    },
    "archive-org": {
      "suggested_key": {
        "default": "Alt+C"
      },
      "description": "Redirect to archive.org"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "archive-redirect@vulakh.us",
      "strict_min_version": "68.0"
    }
  },
  "icons": {
    "128": "icon.png"
  }
}