Examine source code of MojiMatic

{
  "manifest_version": 3,
  "name": "MojiMatic",
  "version": "1.2",
  "description": "Automatically suggest and insert emojis as you type (like Discord).",
  "browser_specific_settings": {
    "gecko": {
      "id": "mojimaticFirefox@sarthak-dev.tech.com"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "emoji-dictionary.js",
        "content.js"
      ],
      "css": [
        "dropdown.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "emojiDictionary.json"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  }
}