Examine source code of Asana Web Clipper

{
  "manifest_version": 2,
  "name": "Asana Web Clipper",
  "version": "1.0",
  "description": "Save webpages as tasks in Asana.",
  "permissions": [
    "activeTab",
    "https://app.asana.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a75c7176-b6b3-41a1-a55d-ee484730d98e}"
    }
  }
}