4chan X is available as a Chrome extension. The Chrome extension has the additional feature of being able to sync your settings and data with other devices via Chrome Sync.
chrome://extensions page. This will not work for the stable or beta versions of Chrome on Windows, which block extensions not from the Chrome store.chrome://extensions and drag the downloaded file onto the page. Alternatively, you can install 4chan X from the Chrome store.You can also use the userscript version of 4chan X with Tampermonkey.
To install the beta version and get updates whenever there's a new beta version:
4chan X currently shares your settings and post history between the HTTP and HTTPS versions of 4chan. If you are concerned about protecting your privacy against a man-in-the-middle attack, you should disable 4chan X on the HTTP version of 4chan and/or install HTTPS Everywhere.