Firefox 158 release notes for developers. JPEG XL is now enabled by default, with lossy and lossless compression, transparency, animation, and HDR. CSS typed arithmetic lets calc() divide values with different units, like 100vw / 1px, to get a unitless number. Notifications gain a navigate option with a URL to open on click, and WebTransport adds getStats(). Behind flags: the random() function, corner-shape, and import defer. #firefox #browser

https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/158