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Disable chrome overlay scrollbar animations #50298

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3 changes: 3 additions & 0 deletions tools/wptrunner/wptrunner/browsers/chrome.py
Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,9 @@ def executor_kwargs(logger, test_type, test_environment, run_info_data, subsuite
chrome_options["args"].append(
"--ip-address-space-overrides=" + address_space_overrides_arg)

# Disable overlay scrollbar animations to prevent flaky wpt screenshots based on timing.
chrome_options["args"].append("--disable-features=ScrollbarAnimations")

# Always disable antialiasing on the Ahem font.
blink_features = ['DisableAhemAntialias']

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