proomt

Search

Search posts, papers, and topics

All posts

Mozilla Automation TeamAlexandra Borovova1 min readintro

Firefox WebDriver Newsletter 154

Summary

Firefox 154 adds the emulation.setLocaleOverride command to WebDriver BiDi, letting tests override the Accept-Language header for fetch and WebSocket requests in workers. The newsletter also lists how to contribute to the multi-language WebDriver codebase and points to setup guides and community channels.

  • The new emulation.setLocaleOverride command enables overriding Accept-Language for fetch and WebSocket requests in workers.
  • Firefox's WebDriver implementation spans JavaScript, Python, and Rust, and accepts external contributions via mentored issues.
  • Resources for contributors include environment setup docs, mentored issue lists for Marionette and BiDi, and a dedicated chatroom.

Test engineers and automation developers should care because the locale override expands testing capabilities for internationalization scenarios.

5/10

Related reading

  1. Firefox WebDriver Newsletter 155

    Firefox 155 WebDriver newsletter lists recent bug fixes and cleanup work, including fixing a DevTools conflict, removing a thin helper, correcting double‑click behavior, and simplifying subscription handling.

    Mozilla Automation Teamfxdx.dev1 min
  2. Icons! Lots of them! – These Weeks in Firefox: Issue 206

    Firefox 154 adds a Windows‑only UI to change the default browser icon, exposes a new Picture‑in‑Picture WebAPI, and ships a raft of small but concrete improvements across Add‑ons, DevTools, WebExtensions, WebDriver and the Rust‑based login storage component. Most changes are toggles or bug‑fixes (e.g., CSS handling in the Debugger, startup‑performance regression fix, storage.local auto‑reset, and…

    Mozilla Automation Teammozilla.org13 min
  3. Firefox DevTools MCP 0.10.3 released

    Firefox DevTools MCP 0.10.3 is released, introducing a new `close_firefox_session` tool, full-page screenshot capability, and configurable download folders. This update also includes bug fixes and clarifies the usage of `restart_firefox` for controlling Firefox via WebDriver BiDi.

    Mozilla Automation Teammozilla.org1 minrelease
  4. High-speed Release Trains – These Weeks in Firefox: Issue 209

    Firefox 155 shipped via a new 2‑week release train; the week’s highlights include a WebExtensions theme API addition, multi‑context address bar in Nightly, DevTools stylesheet editing in the JS debugger, and extensive New Tab page UI/telemetry work (stocks widget, privacy widget, policy‑locked settings). The post also calls out many volunteer contributors and a handful of infrastructure tweaks (T…

    Mozilla Automation Teammozilla.org9 min