issue is related to the video format or MIME type compatibility with Firefox. Safari supports a broader range of video formats by default, while Firefox typically requires specific formats like MP4 (H.264) with AAC audio. To fix this, ensure that the videos on your website are encoded in a universally supported format, such as MP4 with H.264 and AAC. Additionally, double-check the MIME type settings on your web server. Make sure your server is configured to serve video files with the correct MIME types. For example: .mp4 -> video/mp4 .webm -> video/webm You might also consider providing multiple formats (e.g., MP4 and WebM) for better browser compatibility. Tools like HandBrake can help convert your videos to the right format. Once you’ve made these adjustments, test the videos again in Firefox. Hope this helps!