Fix: Firefox 139 Update Causes Graphics Issues with NVIDIA GPUs on Windows PCs

Recently, Mozilla released Firefox 139 Stable with NTP background customization, Experimental Link Previews, and other new features. However, if you’re using an NVIDIA graphics card on a Windows PC, this update may cause ‘graphics corruption’ issues. Mozilla has acknowledged the problem in the release notes and has confirmed that a fix is coming in Firefox 139.0.1.

Some users have reported severe artifacting when playing a video or browsing websites on a secondary monitor with a lower refresh rate than their main display. This issue causes visual distortions on the primary monitor, making normal usage difficult.

Mozilla states: “Windows users with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates may see graphics corruption after updating to Firefox 139.”

If you’re affected by this issue, you can apply the following fix immediately:

1. Launch Firefox
2. Visit about:config in the address bar
3. Find the preference gfx.webrender.dcomp-win.enabled and set it to false
4. Restart Firefox

Mozilla has documented this workaround in the release notes, marking the issue as “Unresolved.” A permanent fix is expected in Firefox 139.0.1.

Windows users with certain NVIDIA graphics adapters and multiple monitors running at mixed refresh rates may see graphics corruption after updating to Firefox 139. As a temporary workaround, set the gfx.webrender.dcomp-win.enabled preference to false in about:config and restart Firefox. This issue will be addressed in Firefox 139.0.1.