{"id":5867,"library":"browser-cookie3","title":"browser-cookie3","description":"browser-cookie3 is a Python library that loads cookies from various web browsers (Chrome, Firefox, Edge, Safari, Opera, Brave, etc.) into a `cookiejar` object. This enables Python programs, often used for web scraping or automation, to download content as seen in a web browser without needing to re-authenticate. The library is actively maintained, with frequent updates to support new browser versions and address changes in cookie storage mechanisms.","status":"active","version":"0.20.1","language":"en","source_language":"en","source_url":"https://github.com/borisbabic/browser_cookie3","tags":["cookies","browser","web scraping","automation","http.cookiejar"],"install":[{"cmd":"pip install browser-cookie3","lang":"bash","label":"Install stable version"}],"dependencies":[{"reason":"Required for certain cookie decryption operations.","package":"lz4","optional":false},{"reason":"Required for decrypting encrypted browser cookies.","package":"pycryptodomex","optional":false},{"reason":"Required on Linux for D-Bus communication with some browsers to retrieve cookie information.","package":"dbus-python","optional":false},{"reason":"Pure Python D-Bus interface, often used in conjunction with dbus-python.","package":"jeepney","optional":false},{"reason":"Likely used for accessing locked cookie databases.","package":"shadowcopy","optional":false}],"imports":[{"note":"The library is imported as `browser_cookie3`.","symbol":"browser_cookie3","correct":"import browser_cookie3"},{"note":"Ensure you are using `browser_cookie3` (Python 3 fork) and not the older `browser_cookie` module, which was for Python 2.","wrong":"cj = browser_cookie.chrome()","symbol":"chrome","correct":"cj = browser_cookie3.chrome()"}],"quickstart":{"code":"import browser_cookie3\nimport requests\nimport os\n\ndef get_cookies_for_requests(browser_function):\n    \"\"\"Gets cookies from a specified browser function and returns a requests.cookies.RequestsCookieJar.\"\"\"\n    try:\n        # The specific browser function (e.g., browser_cookie3.chrome())\n        # returns a http.cookiejar.CookieJar object.\n        cj = browser_function(domain_name='example.com') # Filter for a specific domain for efficiency\n        return cj\n    except Exception as e:\n        print(f\"Error loading cookies from {browser_function.__name__}: {e}\")\n        return None\n\n# Example: Get cookies from Chrome and use them with requests\n# Make sure you are logged into 'example.com' in Chrome before running.\nchrome_cookies = get_cookies_for_requests(browser_cookie3.chrome)\n\nif chrome_cookies:\n    print(f\"Successfully loaded {len(list(chrome_cookies))} cookies from Chrome.\")\n    # Use the cookies with the requests library\n    # Replace 'https://example.com' with the actual URL you want to access\n    # Ensure the URL matches the domain for which cookies were loaded.\n    try:\n        response = requests.get('https://example.com', cookies=chrome_cookies)\n        response.raise_for_status() # Raise an HTTPError for bad responses (4xx or 5xx)\n        print(f\"Successfully fetched page from example.com. Status code: {response.status_code}\")\n        # print(response.text[:500]) # Print first 500 characters of the content\n    except requests.exceptions.RequestException as e:\n        print(f\"Request failed: {e}\")\nelse:\n    print(\"Could not load cookies from Chrome. Make sure Chrome is running and you are logged in.\")\n\n# You can also try other browsers:\n# firefox_cookies = get_cookies_for_requests(browser_cookie3.firefox)\n# if firefox_cookies:\n#     print(f\"Loaded {len(list(firefox_cookies))} cookies from Firefox.\")\n","lang":"python","description":"This quickstart demonstrates how to load cookies from a specific browser (e.g., Chrome) and then use them with the popular `requests` library to access a website as if you were logged in. The `domain_name` argument is optional but recommended for performance and security. Replace 'example.com' with the target domain."},"warnings":[{"fix":"Check the GitHub repository's issues for reported compatibility problems and potential workarounds. Update `browser-cookie3` to the latest version. Consider using `cj = browser_cookie3.load()` to try all supported browsers if one fails.","message":"Browser updates frequently change cookie storage formats, encryption methods, or file locations. These external changes can unexpectedly break `browser-cookie3`'s ability to locate or decrypt cookies for specific browser versions or operating systems. Users may need to wait for library updates to restore compatibility.","severity":"gotcha","affected_versions":"All versions, due to external dependencies."},{"fix":"Adapt web scraping strategies to rely less on third-party cookies. Be aware that sites may implement new anti-bot or privacy measures that impact automated access even with first-party cookies.","message":"Major browsers (Chrome, Firefox, Safari) are phasing out or severely restricting third-party cookies. While `browser-cookie3` primarily handles first-party cookies, this broader change in the web's cookie landscape might affect expected scraping behavior or introduce new errors if your target websites rely on third-party cookie functionality for authentication or content delivery.","severity":"breaking","affected_versions":"All versions. This is an ecosystem-level change."},{"fix":"Provide detailed environment information (OS, browser, browser version, Python version) when reporting issues on GitHub. Test with different browsers or on different operating systems if possible. Ensure your browser profile is not locked or inaccessible.","message":"Users frequently report browser-specific and OS-specific issues, such as cookie decryption failures for Microsoft Edge or Chrome on certain Windows versions, incorrect Firefox profile detection on Linux, or the library ceasing to function entirely on particular setups. These often manifest as `FileNotFoundError`, decryption errors, or empty cookie jars.","severity":"gotcha","affected_versions":"All versions, depends on user environment."},{"fix":"Ensure `dbus-python` and `jeepney` are installed. On Debian/Ubuntu, try `sudo apt-get install python3-dbus` in addition to `pip install browser-cookie3`.","message":"On Linux, `dbus-python` and `jeepney` are crucial dependencies for `browser-cookie3` to interact with some browsers. Users often encounter errors if these packages are not correctly installed, especially `dbus-python`, which may require system-level packages (e.g., `python3-dbus` on Debian/Ubuntu) in addition to pip installation.","severity":"gotcha","affected_versions":"All versions on Linux."},{"fix":"If encountering segfaults with Python 3.14+, consider using an earlier Python version (e.g., 3.11, 3.12, 3.13) or a non-free-threaded build. Monitor the GitHub repository for updates addressing this compatibility issue.","message":"A segmentation fault (`Segfault`) has been reported when running `browser-cookie3` with Python 3.14 (specifically, in a free-threaded build). This indicates a potential incompatibility with future Python versions, which might break functionality for users upgrading their Python environment.","severity":"breaking","affected_versions":"Potentially Python 3.14 and later (free-threaded builds)."}],"env_vars":null,"last_verified":"2026-04-14T00:00:00.000Z","next_check":"2026-07-13T00:00:00.000Z"}