Examine source code of Active Pinned Tab

{
  "manifest_version": 2,
  "name": "Active Pinned Tab",
  "description": "When this extension is enabled, pinned tabs will be automatically moved to the current window.",
  "author": "BlackGlory",
  "version": "1.0.2",
  "icons": {
    "16": "assets/images/icon-16.png",
    "32": "assets/images/icon-32.png",
    "48": "assets/images/icon-48.png",
    "64": "assets/images/icon-64.png",
    "128": "assets/images/icon-128.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApLogSoSwaWcFYlvBUnOT/MqsczL4PAQFEhOVggDC2xKva1oRAIM9ppHGUVCBzXf5wopdDRF5OyVPK6umSt1wMuKCa3YIQoyLPjQGwqo3y8XNW5/sN5Hw8ftv2FHPOaV8skf97eETcVa2mozlSZqEjU918KXtNEaws/s47dbNtWJDbUHQANS6vSP3Xx699+7EGoz05DnrdcoVpRGPqy7y8Oq2HPtJe3LtCnHsXGgHgGiqH6qPha+5AHb8AwTu2sH+vc/8sQScW2F7bkQ/rPd5n2lnK2fj2LLPR0Xr1ShwBkEYmS3fKPeMn7rwbCY+lgZ7p9CidAW8MD35xTeye/fqAwIDAQAB"
}