Examine source code of Asana Tweaks

{
  "name": "Asana Tweaks",
  "description": "Adds a few small enhancements to the Asana project management system.",
  "version": "1.0.5resigned1",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "32": "img/asana-tweaks_32.png",
    "48": "img/asana-tweaks_48.png",
    "64": "img/asana-tweaks_64.png",
    "128": "img/asana-tweaks_128.png"
  },
  "permissions": [
    "*://app.asana.com/*",
    "contextMenus",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://app.asana.com/*"
      ],
      "js": [
        "js/asana-tweaks.js"
      ],
      "css": [
        "css/asana-tweaks.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{de15a904-dd6b-4240-9c60-75f57376082c}"
    }
  }
}