Mozilla was born at Netscape in 1998 with the public release of the Netscape source code. To celebrate the 15th anniversary of that beginning, we wanted to walk people through a timeline of 15 milestones in Mozilla’s history, and do it with a bit of flair. So we made a fancy slide show. It’s perhaps a rare valid use-case for a carousel on a website.
This uses jQuery (hey, it was 2014) to step through the slides, but the actual motion is all pure CSS animation; jQuery essentially just toggles classes off and on and maintains the sequential order. If JavaScript isn’t available it defaults to a simplified list (also the default experience in smaller viewports where there isn't room for the slide transitions).
The slide show was only supposed to be on the site for a month, but people really liked it so it stayed in place far longer than intended. It was finally decommissioned in 2019 as we were gradually rebranding the entire site and there just wasn’t a place for it any more. I salvaged this copy from the Wayback Machine with a bit of cleanup.