Examine source code of Gemini Usage Bar

{
  "manifest_version": 3,
  "name": "Gemini Usage Bar",
  "version": "1.0.1",
  "description": "Displays real-time Gemini usage limits (current and weekly) directly in the Gemini interface.",
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-usage-bar@firefox",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": "icon128.png",
    "default_title": "Gemini Usage Bar"
  },
  "permissions": [
    "storage",
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "https://gemini.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://gemini.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "commands": {
    "toggle-usage-visibility": {
      "suggested_key": {
        "default": "Alt+U"
      },
      "description": "Toggle the visibility of the usage bar"
    }
  }
}