⏰ Old Post
This post is over 7 years old - it might be slightly outdated and consigned to the history books.
We've updated our Firefox add-on to be Web Extension compatible. This is a worthwhile upgrade if you're using the old Firefox extension as it now works almost identically to the Chrome extension.
Get it here - https://addons.mozilla.org/en-US/firefox/addon/builtwith/
For support email us via https://builtwith.com/contact
