Apple's iPhone Duo, its first folding iPhone, went on sale October 23, 2026, and it shipped with Safari 27.1. WebKit says sites built with standard responsive techniques should work on it without changes. The work for agencies is testing, because one phone now covers viewport widths from 382 to 951 CSS pixels. This post covers what the device looks like to a web page, what WebKit and Apple say to do, the folding APIs that are still behind feature flags, and a test plan you can run in Xcode without buying the phone.

The Chrome release cycle is now two weeks long. Chrome 153 reached the stable channel on September 8, 2026, and a new major version has followed every two weeks since. Chrome 157 is scheduled for stable on November 3, the day this post runs. Our Chrome XSLT removal post showed one effect of the change. A removal tied to Chrome 158 arrives on November 17, sooner than the version number suggests.

Global Privacy Control is coming to Chrome. In Chrome 157, eligible users can turn on a setting that makes Chrome send a Sec-GPC: 1 header with their requests and set navigator.globalPrivacyControl to true. Firefox, Brave and DuckDuckGo already support the signal. This post explains what the signal is, how Chrome is rolling it out, and how to detect it on the server and in the browser.

The Chrome HTTP warning is now on for everyone. In an October 21, 2026 post, Google said Chrome now asks users for permission before it loads a site over plain HTTP, and that this is the default for all users. Before that, it reached Enhanced Safe Browsing users, a small test group, and people who turned on a setting called "Always Use Secure Connections."

Chrome XSLT support ends with Chrome 158, which reaches the stable channel on November 17, 2026. From that release, Chrome stops running XSLT stylesheets on XML files, except for sites in Google's Origin Trial and organizations using an Enterprise Policy. Those two exceptions end with Chrome 176 on August 17, 2027. XSLT is an old W3C language that turns XML into HTML.

Firefox ESR 140 receives its last point release, 140.17, alongside Firefox 157 on September 29, 2026. After that the branch is done, and the institutions that pin Extended Support Release move to ESR 153. If you build for nonprofits, higher education, government or libraries, ESR is your real Firefox support floor, whatever your browserslist config says. That floor is about to move forward thirteen versions in one step, which is the largest single day change to a Firefox support matrix in years.

Opera's latest update enhances its desktop browsers with built-in translation, custom animated cursors, and improved multitasking features, enhancing user experience.

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