Examine source code of Web Monetization

{
  "name": "Web Monetization",
  "version": "1.2.5",
  "manifest_version": 3,
  "description": "__MSG_appDescription__",
  "icons": {
    "32": "assets/icons/32x32/default.png",
    "48": "assets/icons/48x48/default.png",
    "128": "assets/icons/128x128/default.png"
  },
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://localhost/*",
        "http://127.0.0.1/*"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "https://*/*",
        "http://localhost/*",
        "http://127.0.0.1/*"
      ],
      "js": [
        "polyfill/polyfill.js"
      ],
      "run_at": "document_start",
      "world": "MAIN",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "scripting"
  ],
  "action": {
    "default_title": "Web Monetization",
    "default_popup": "popup/index.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "pages/progress-connect/*",
        "assets/fonts/**/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "host_permissions": [
    "https://*/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "financialAndPaymentInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      },
      "id": "tech@interledger.com"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}