Examine source code of Ice Dodo

{
  "action": {
    "default_icon": "assets/icons/icon.png",
    "default_popup": "index.html"
  },
  "description": "Play 3D game easily by clicking the little icon at the top right corner of your browser.",
  "differential_fingerprint": "1.e5a714144a7be06272e0aa61d441d64daf2b339bc47f0075b3f2e1819393db1e",
  "externally_connectable": {
    "matches": [
      "https://*.onionfist.com/*"
    ]
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwB3V/uT8U9xtQFoJIcndfixhNRsnlWc/f16Y/WpCBt+H3qcJSUKnfPOGFT+NTKlZcMUhnWo2Phh1VCV0gEazlPUC06CgITEteLrdY5+OZZdlm9vC7DTtRmmFGNgBYrUKgfoXSsviIkoA10T20qUD8Wqspsbykj9gYY9J65Qe0TsILUw22enPIfKmtS+JkJlLCQAkQJsuBaa0qRQqq9jpHkmiD7rucPhz9gt5taT0sVL2/g+2NGiF0x5LDnY1fxpohuEprkARR7bql77gPpjXqcd12LPWKTafRXA0R9kJ0sBZWjb2ea1ICCmRz9NOLuxhamZ8fLIE5+aaPBDKG4d9KQIDAQAB",
  "manifest_version": 2,
  "name": "Ice Dodo",
  "permissions": [
    "storage"
  ],
  "short_name": "Ice Dodo",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "0.121",
  "browser_specific_settings": {
    "gecko": {
      "id": "{305632ff-8fa2-40c5-9694-095a31e0c052}"
    }
  }
}