async def navigate_back(self) -> str:
        """
        Navigate back to the previous web page.
        """
        if self.async_browser is None:
            raise ValueError("Async browser is not initialized")
        page = await self._aget_current_page(self.async_browser)
        response = await page.go_back()

        if response:
            return (
                f"Navigated back to the previous page with URL '{response.url}'."
                f" Status code {response.status}"
            )
        else:
            return "Unable to navigate back; no previous page in the history"

        Navigate back to the previous web page.
        
llama-index-integrations/tools/llama-index-tools-playwright/llama_index/tools/playwright/base.py