Firefox 129 Now Available With HTTPS Replacing HTTP As Default Protocol Written by Michael Larabel in Mozilla on 5 August 2024 at 10:43 AM EDT. 47 Comments Mozilla Firefox 129.0 is now available for download ahead of its formal release announcement on Tuesday. Making Firefox 129 notable is that for non-local sites it's now replacing HTTP with HTTPS by default. Firefox will now aim for HTTPS as the