2026-09-09 - web 1.10.3 / core 1.31.1 ​

Seventh snapshot axis: User-Agent. On an autotest run Device is ignored, User-Agent is applied.

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Added ​

• On execution context: a User-Agent catalog (Playwright models). Choosing a User-Agent can offer to write screen resolution and Device; choosing a Device that has exactly one linked User-Agent can offer User-Agent and screen.
• Autotest runs: the worker sends the HTTP User-Agent and mobile / touch flags from that axis. Empty User-Agent - the engine default header.

Changed ​

• Device on the snapshot still describes the environment for people. The worker does not emulate it (no Playwright phone profile from that field). Phone-like header and window come from User-Agent and screen resolution. Chromium plus an iPhone User-Agent stays Chromium.
• The execution context list on create run no longer drops snapshots that have a phone or tablet in Device, as long as the browser is in the Playwright set (Chromium, Firefox, WebKit / Safari-as-WebKit, headless Chromium).
• User docs: Autotests, Execution context.