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<rdar://problem/76416848>
Created attachment 425623 [details] Patch
Comment on attachment 425623 [details] Patch It seems like progress bars should animate in sync with the vsync refresh rate, but that would involve a much larger refactoring. Perhaps this adjustment is okay for the time being..
Created attachment 425944 [details] Patch for landing
Committed r275942 (236504@main): <https://commits.webkit.org/236504@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 425944 [details].