Firefox 160 release notes for developers

Screenshot of browser developer tools with the Inspector panel open on web-standards.dev, a large Firefox logo overlaid, and the text “Firefox 160”.

On-device speech recognition with the Web Speech API now works on desktop for real-time speech-to-text in 40 languages. WebTransport gets custom request headers, byte streams for datagrams, and new buffering options. The ::-webkit-input-placeholder pseudo-element now works as an alias of ::placeholder. Behind flags: blocking="render", lazy loading for <video> and <audio>, and the Speculation-Rules header.

developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/160