Examine source code of AWS credentials from SAML

{
  "manifest_version": 2,
  "name": "AWS credentials from SAML",
  "version": "0.4",
  "description": "This extension will capture the SAMLResponse during SSO to AWS and automatically exchange it for AWS credentials",
  "browser_specific_settings": {
    "gecko": {
      "id": "aws-credentials-from-saml@andreabedini.com"
    }
  },
  "background": {
    "scripts": [
      "lib/browser-polyfill.js",
      "background.js"
    ]
  },
  "permissions": [
    "downloads",
    "webRequest",
    "https://signin.aws.amazon.com/saml"
  ]
}