Examine source code of Thredd - Collaborative Browsing

{
  "manifest_version": 2,
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "19": "images/thredd19.png",
      "38": "images/thredd38.png"
    },
    "default_popup": "popup.html",
    "default_title": "Thredd"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "thredd.dev@example.com",
      "strict_min_version": "66.0"
    }
  },
  "description": "Get reviews for the page you're reading or recommendations for similar content - crowdsourced from Reddit!",
  "options_page": "options.html",
  "icons": {
    "19": "images/thredd19.png",
    "32": "images/thredd32.png",
    "38": "images/thredd38.png",
    "48": "images/thredd48.png",
    "64": "images/thredd64.png",
    "128": "images/thredd128.png"
  },
  "name": "Thredd - Useful Advice from Reddit",
  "short_name": "Thredd",
  "permissions": [
    "identity",
    "contextMenus",
    "notifications",
    "tabs",
    "*://*/*",
    "storage"
  ],
  "update_url": "http://clients2.google.com/service/update2/crx",
  "version": "3.0.0",
  "web_accessible_resources": [
    "comment.html",
    "options.html",
    "popup.html",
    "images/thredd256.png"
  ]
}