Firefox 156 is out with faster start-up times for its built-in PDF viewer and lower CPU usage when viewing large JPEG images. As you browse the web you (pretty much always) see images smaller than their native resolution. To wit, if I embed a 4K JPEG in this post, for example, you don’t see it at full size: it’s downscaled to fit on the page. Same amount of pixel data, but squeezed by CSS. In Firefox 156, the browser now uses libjpeg-turbo’s IDCT scaling to reduce images during decoding, rather than loading a full-size image into memory and then shrinking […]You're reading Firefox 156 reduces CPU usage when viewing JPGs, a blog post from OMG! Ubuntu. Do not reproduce elsewhere without permission.