Introduced by: https://github.com/WebKit/WebKit/commit/fa4a5245bfbbbbd12c6fd9fea70b4efc83f2023a The fix is simple, we just need to expect that argument in the init here: https://github.com/WebKit/WebKit/blob/a48e91ce4ab51138a9c6f01a2289c5429f11be21/Tools/Scripts/webkitpy/benchmark_runner/browser_driver/linux_browser_driver.py#L48 I'll submit a fix right now.
Pull request: https://github.com/WebKit/WebKit/pull/11581
Committed 261723@main (9179a6c1494d): <https://commits.webkit.org/261723@main> Reviewed commits have been landed. Closing PR #11581 and removing active labels.
<rdar://problem/106782597>
Thank you and sorry for the disruption!