[Webkit-unassigned] [Bug 272753] New: Above 120hz animations are not supported on Macs with external displays.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=272753

            Bug ID: 272753
           Summary: Above 120hz animations are not supported on Macs with
                    external displays.
           Product: WebKit
           Version: Safari 17
          Hardware: Mac (Apple Silicon)
                OS: macOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jeff03blue at gmail.com
                CC: dino at apple.com, graouts at apple.com

Currently displays can go up to 500hz. Chrome and Firefox both support an unlimited refresh rate for animations.

This is needed for games so that players can see higher fps and hz.

You can test this with a monitor that has higher than 120hz on https://www.testufo.com

Also Note: PWAs do not support above 60hz animations because the "prefer page rendering updates near 60fps" feature flag is on by default. This feature flag will have to be off to test for this bug regardless if you test in a PWA or normal Safari.

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