Examine source code of Akamai MFA for Firefox

{
  "manifest_version": 2,
  "name": "Akamai MFA",
  "version": "2.6.2",
  "minimum_chrome_version": "88",
  "icons": {
    "128": "img/icon.png"
  },
  "applications": {
    "gecko": {
      "id": "agrinman@akamai.com"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://localhost/*",
        "http://*.localhost/*",
        "https://*.local/*",
        "https://*.pr.pushzero-dev.akamai.com/*",
        "https://pushzero-dev.akamai.com/*",
        "https://pushzero-test.akamai.com/*",
        "https://mfa.akamai.com/*",
        "https://try-webauthn.appspot.com/*",
        "https://webauthn.bin.coffee/*",
        "https://webauthn.io/*",
        "https://webauthn.me/*"
      ],
      "run_at": "document_start",
      "js": [
        "js/content_script.js"
      ],
      "css": [
        "content_script.css"
      ]
    }
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "js/background.js"
    ]
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "img/icon.png"
    }
  },
  "permissions": [
    "http://localhost/*",
    "http://*.localhost/*",
    "https://*.local/*",
    "https://*.pr.pushzero-dev.akamai.com/*",
    "https://pushzero-dev.akamai.com/*",
    "https://pushzero-test.akamai.com/*",
    "https://mfa.akamai.com/*",
    "https://try-webauthn.appspot.com/*",
    "https://webauthn.bin.coffee/*",
    "https://webauthn.io/*",
    "https://webauthn.me/*",
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "web_accessible_resources": [
    "js/inject.js",
    "img/*"
  ]
}