Examine source code of HipDash

{
  "manifest_version": 2,
  "name": "HipDash",
  "version": "1.1.3resigned1",
  "description": "",
  "homepage_url": "https://app.hipdash.com",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "applications": {
    "gecko": {
      "id": "dev@hipdash.com",
      "strict_min_version": "43.*"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.infusionsoft.com/hipdash*"
      ],
      "js": [
        "hipdashext.js"
      ],
      "css": [
        "hipdashext.css"
      ]
    }
  ]
}