Examine source code of Smooth Operator

{
  "name": "Smooth Operator",
  "version": "0.0.9",
  "manifest_version": 2,
  "description": "Browser plugin to make the work from the operators smooth.",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "host_permissions": [
    "https://*.force.com/*",
    "https://*.salesforce.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.force.com/*",
        "https://*.salesforce.com/*"
      ],
      "js": [
        "js/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{700975d5-6d61-4ee2-bc43-5e63cc5740cb}"
    }
  }
}