Examine source code of Synapse - Language Learning

{
  "manifest_version": 3,
  "name": "Synapse - Language Learning",
  "version": "1.0.1",
  "description": "Learn words while browsing. Click any word to see pronunciation, definition, and save to your personal dictionary.",
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@synapse-translate.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "browsingActivity",
          "websiteActivity",
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "http://localhost/auth/extension*",
        "http://127.0.0.1/auth/extension*",
        "https://localhost/auth/extension*",
        "https://127.0.0.1/auth/extension*"
      ],
      "js": [
        "auth.js",
        "api.js",
        "extension.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "http://localhost/auth/extension*",
        "http://127.0.0.1/auth/extension*",
        "https://localhost/auth/extension*",
        "https://127.0.0.1/auth/extension*"
      ],
      "js": [
        "auth.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Synapse Dictionary",
    "default_popup": "popup.html"
  }
}