Examine source code of Post-Run Recovery

{
  "manifest_version": 2,
  "name": "Post-Run Recovery",
  "version": "1.0",
  "description": "Discover stretching exercises and recovery tips after your runs.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "images/post-logo.png"
    }
  },
  "icons": {
    "128": "images/post-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{00a933be-37f1-495c-9259-37279b3f3135}"
    }
  }
}