Examine source code of Instagram Demetricator

{
  "browser_action": {
    "default_icon": "id-logo-128.png",
    "default_popup": "options.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "id.css"
      ],
      "js": [
        "jquery.min.js",
        "id.user.js"
      ],
      "matches": [
        "*://*.instagram.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Hides all the metrics on Instagram.",
  "homepage_url": "http://bengrosser.com/projects/instagram-demetricator/",
  "icons": {
    "32": "id-logo-32.png",
    "128": "id-logo-128.png"
  },
  "manifest_version": 2,
  "name": "Instagram Demetricator",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "version": "1.0.7",
  "applications": {
    "gecko": {
      "id": "instagramdemetricator@bengrosser.com",
      "strict_min_version": "58.0"
    }
  }
}