WebDriver/RemoteProtocol/WebDriver BiDi/Milestone 19

WebDriver BiDi Milestone 19 - Completed March 29th, 2026

Goal: This milestone will focus on delivering high-priority APIs required for experimental WebDriver BiDi support in Playwright, including capabilities such as CSP bypass, correctly applying user context configurations when invoking `window.open`. In parallel, we will enable widget-level touch event support for web-platform tests and continue evolving the BiDi framework to properly support chrome browsing contexts and workers. This work is foundational for future use cases, including controlling Firefox via MCP servers.

Progress:

• Tracking spreadsheet

Queries:

• Completed Bugs

Milestone Backlog:

Bugzilla query error

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