Examine source code of Asana Navigator

{
  "author": "Shun Sakurai",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "css": [
        "main.css"
      ],
      "js": [
        "content_script.js",
        "ui_platform.js",
        "ui_translation.js"
      ],
      "matches": [
        "https://app.asana.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "description": "Enhance navigation for Asana -- less mouse moves and key presses.",
  "homepage_url": "https://github.com/ShunSakurai/asana-navigator",
  "icons": {
    "16": "images/an16.png",
    "48": "images/an48.png",
    "128": "images/an128.png"
  },
  "incognito": "spanning",
  "manifest_version": 2,
  "name": "Asana Navigator",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "https://app.asana.com/*",
    "activeTab",
    "storage",
    "tabs"
  ],
  "short_name": "AsaNavigator",
  "version": "2.5.12"
}