Examine source code of SubmitFilesToChatGPT

{
  "manifest_version": 2,
  "name": "SubmitFilesToChatGPT",
  "version": "1.0",
  "description": "A Firefox extension that allows you to submit files to ChatGPT.",
  "permissions": [
    "https://chat.openai.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://chat.openai.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "submitfilestochatgpt@chatgptextensions.com",
      "strict_min_version": "60.0"
    }
  }
}