Examine source code of No Emoji

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "short_name": "no-emoji",
  "description": "__MSG_extensionDescription__",
  "version": "0.1.3",
  "default_locale": "en",
  "minimum_chrome_version": "121",
  "browser_specific_settings": {
    "gecko": {
      "id": "no-emoji@erikdesjardins.io",
      "strict_min_version": "121.0"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'"
  },
  "background": {
    "scripts": [
      "background.entry.js"
    ],
    "service_worker": "background.entry.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.entry.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "19": "icon19-inactive.png",
      "38": "icon38-inactive.png"
    }
  }
}