Examine source code of Web3 Decode Extension

{
  "manifest_version": 3,
  "name": "Web3 Decode Extension",
  "version": "0.0.2",
  "description": "Decode web3 transactions with ease",
  "permissions": [],
  "devtools_page": "devtools.html",
  "icons": {
    "512": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@web3-decode-extension"
    }
  }
}