Hello, At this time there is no timeline when Mozilla will support live captions for Firefox. There was previous work done but that was a long time ago (source: https://bugzilla.mozilla.org/show_bug.cgi?id=1232476) and no updates have been made since then. While there is no way to provide feedback to the developers through the browser (Help > Submit Feedback) at this time, you can use these other communities to make known your request: Discourse : https://discourse.mozilla.org/c/firefox-development Reddit : https://www.reddit.com/r/firefox/ Twitter : https://twitter.com/firefox Facebook : https://www.facebook.com/Firefox I hope this answers your question!