Examine source code of Gemini Delete for Firefox

{
  "manifest_version": 2,
  "name": "Gemini Delete for Firefox",
  "description": "Gemini Delete Chat Extension for Firefox",
  "version": "1.4",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "assets/gemini.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "*://gemini.google.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://gemini.google.com/*"
      ],
      "js": [
        "scripts/add-checkbox.js",
        "scripts/remove-checkbox.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-delete@example.com"
    }
  }
}