{
  "id": 5109279,
  "title": "Firefox and Thunderbird hit the fortnightly release treadmill",
  "url": "https://urgent.news/2026/09/02/firefox-and-thunderbird-hit-the-fortnightly-release-treadmill",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-02T14:53:46.000Z",
  "source": {
    "name": "The Register Science",
    "slug": "the-register-science",
    "url": "https://www.theregister.com/software/2026/09/02/firefox-and-thunderbird-hit-the-fortnightly-release-treadmill/5293953"
  },
  "original_language": "en",
  "account": "Mozilla has released Firefox 155 and Thunderbird 155, following an accelerated release schedule starting in September. The new features in Firefox 155 focus on AI capabilities, including a Smart Window feature, improved tab-group naming, and the ability to display blocked trackers in the address bar. The containers feature, introduced in Firefox 153, now allows users to rearrange containers. Firefox also supports Happy Eyeballs v3 for faster page loading and scales PDFs to fit on printed pages. Thunderbird 155 introduces several enhancements, such as displaying the number of blocked trackers, improved S/MIME encrypted attachment handling, and better OAuth authentication. Additionally, it fixes around 30 bugs and closes several vulnerabilities. Users can still opt for the ESR (Extended Support Release) version, which includes the AI kill switch. The release also brings Marathi and Urdu language support for Thunderbird.",
  "summary": "Don't disable automatic updates if the pace is too much – that's what ESR is for",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 2,
    "also_reported_by": [
      {
        "outlet": "The Register Software",
        "title": "Firefox and Thunderbird hit the fortnightly release treadmill",
        "url": "https://urgent.news/2026/09/02/firefox-and-thunderbird-hit-the-fortnightly-release-treadmill-5109937",
        "published": "2026-09-02T14:53:46.000Z"
      }
    ]
  },
  "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."
}