Examine source code of DeepSeek Fact Checker

{
  "manifest_version": 2,
  "name": "DeepSeek Fact Checker",
  "version": "1.0",
  "description": "Quickly fact-check selected text using DeepSeek. Right-click or use a keyboard shortcut to copy a fact-check prompt to your clipboard.",
  "permissions": [
    "contextMenus",
    "tabs",
    "clipboardWrite",
    "notifications",
    "*://*.deepseek.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon-48.png"
  },
  "commands": {
    "fact-check": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "Command+Shift+F"
      },
      "description": "Trigger fact-check"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{41355dba-9df7-4fd0-a8c2-abda74182fee}"
    }
  }
}