Closed Bug 1412621 Opened 4 years ago Closed 3 years ago
Frequent 30 FPS VSYNC in Windows 10 Fall Creators Update (version 1709)
Since updating to the Fall Creators Update I've been getting frequent drops to 30 FPS in Firefox, most noticeable when scrolling or watching a video. This is a fresh install of Windows using a fresh install and fresh profile in Firefox 56.0.2 and 58.0a1 (2017-10-28), with the latest graphics drivers. I haven't been able to reliably reproduce it, but it seems to occur most frequently when more than one Firefox window is open, or when playing a video. I haven't observed any increase in CPU or GPU usage while the issue is occurring. I have not seen this issue in Edge, or any other application, so if it's a Windows bug, it only seems to affect Firefox.
4 years ago
Still an issue on Firefox 58, which continues to make the Fall Creators Update unusable to me. New info though, having a window on screen which does hold VSYNC properly, such as Edge with a 60FPS animation playing, seems to keep Firefox smooth. Having to have Edge running in the background forever does not seem like a good long-term solution though.
Status: UNCONFIRMED → RESOLVED
Closed: 3 years ago
Resolution: --- → INVALID
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