Examine source code of FastRPC

{
  "manifest_version": 2,
  "name": "FastRPC",
  "version": "2.5",
  "description": "This DevTools extension adds another panel that shows decoded FastRPC (protocol v1, v2, v3) requests and responses.",
  "devtools_page": "devtools.html",
  "author": "Ondřej Žára <ondrej.zara@firma.seznam.cz>",
  "homepage_url": "https://github.com/seznam/fastrpc-viewer",
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  }
}