[Bug]: Playwright VSCode plugin ignores headless property

[marlowp]

Version

1.49.1

Steps to reproduce

1. Set the headless property to false in the use section of a standard config in playwright.config.ts.
2. Use the Playwright Test for VSCode extension to run an individual test from the Testing > Test Explorer panel.
3. Observe that the test is still executed in headless mode.

I've tracked back through the versions of Playwright to see at what point this has broken and it works as expected in 1.48.0 but is broken in 1.48.1 and above. Looking at the Release Notes for 1.48.1 it maybe related to the fix for #33023?

Executing tests from the command line via npx playwright test does respond correctly to the headless property.

Expected behavior

The tests executed from the Playwright Test for VSCode extension adhere to the headless property.

Actual behavior

The tests executed from the Playwright Test for VSCode extension ignore the headless property.

Additional context

No response

Environment

System:
    OS: Windows 11 10.0.22631
    CPU: (20) x64 13th Gen Intel(R) Core(TM) i7-1370P
    Memory: 16.45 GB / 31.69 GB
  Binaries:
    Node: 23.6.0 - C:\Program Files\nodejs\node.EXE
    npm: 10.9.2 - C:\Program Files\nodejs\npm.CMD
  IDEs:
    VSCode: 1.96.3 - C:\Users\peter.marlow\AppData\Local\Programs\Microsoft VS Code\bin\code.CMD
  npmPackages:
    @playwright/test: ^1.49.1 => 1.49.1