{
  "id": 14064892,
  "title": "Firefox 158 Now Available With JPEG-XL Support By Default",
  "url": "https://urgent.news/2026/10/12/firefox-158-now-available-with-jpeg-xl-support-by-default-14064892",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-12T23:00:00.000Z",
  "source": {
    "name": "Slashdot",
    "slug": "slashdot",
    "url": "https://news.slashdot.org/story/26/10/12/2131234/firefox-158-now-available-with-jpeg-xl-support-by-default"
  },
  "original_language": "en",
  "account": "Firefox 158 has been released with JPEG XL image support enabled by default, making the .jxl format a standard feature instead of an experimental one. Alongside this, the browser's default image Accept header now includes support for image/jxl, allowing JPEG XL to be used as an alternative to WebP, JPEG, PNG, and GIF. Prior versions of Firefox had to enable JPEG XL through an experimental option, but Firefox 158 removes this barrier. Additionally, the browser now offers faster form filling in Smart Window when interacting with form fields or selecting Fill from sources. For developers, CSS typed arithmetic is now supported, enabling the use of functions like calc() to perform calculations with values of the same data type and different units. The developer changes and release binaries can be found at the respective links provided in the source.",
  "summary": "Firefox 158 is now available with JPEG XL image support enabled by default, making .jxl images a standard part of the browser rather than an experimental feature. The release also adds JPEG XL to Firefox's default image Accept header, improves Smart Window form filling, and brings new CSS typed-arithmetic support for developers. Phoronix reports: At long last, Firefox 158 is ready to go with…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}