Examine source code of Robin

{
  "manifest_version": 2,
  "name": "Robin",
  "description": "Robin helps people do their best work by giving everyone the ability to understand, use, and advance their workplace.",
  "version": "4.13.0",
  "permissions": [
    "https://extensions.robinpowered.com/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "public/robin-extensions.google-browser-extension.background.3e5ced0df38da33eb845.js"
    ]
  },
  "browser_action": {
    "default_icon": "public/images/robin-thumb.png",
    "default_popup": "public/popup/popup.html",
    "default_title": "Robin"
  },
  "content_scripts": [
    {
      "js": [
        "public/robin-extensions.google-browser-extension.content.ea74ccbc4c5b0b2f0d91.js"
      ],
      "css": [
        "public/robin-extensions.google-browser-extension.content.10e310d8334bad2b.css"
      ],
      "matches": [
        "*://calendar.google.com/*",
        "https://*.robinpowered.com/*",
        "https://robinpowered.com/*"
      ]
    }
  ],
  "icons": {
    "16": "public/images/robin-thumb-16.png",
    "128": "public/images/robin-thumb.png"
  },
  "web_accessible_resources": [
    "*images/*.png",
    "*.js"
  ]
}