Bug 1696495 - Block WebRender on XWayland explicitly due to bug 1635186. r=rmader

Differential Revision: https://phabricator.services.mozilla.com/D107297

widget/GfxInfoX11.cpp

@@ -719,6 +719,18 @@ const nsTArray<GfxDriverInfo>& GfxInfo::GetGfxDriverInfo() {
         V(0, 0, 0, 0), "FEATURE_FAILURE_WEBRENDER_BUG_1673939",
         "https://gitlab.freedesktop.org/mesa/mesa/-/issues/3720");
 
+#ifndef EARLY_BETA_OR_EARLIER
+    // Bug 1635186 - Poor performance with video playing in a background window
+    // on XWayland.
+    APPEND_TO_DRIVER_BLOCKLIST_EXT(
+        OperatingSystem::Linux, ScreenSizeStatus::All, BatteryStatus::All,
+        DesktopEnvironment::All, WindowProtocol::XWayland, DriverVendor::All,
+        DeviceFamily::All, nsIGfxInfo::FEATURE_WEBRENDER,
+        nsIGfxInfo::FEATURE_BLOCKED_DEVICE, DRIVER_COMPARISON_IGNORED,
+        V(0, 0, 0, 0), "FEATURE_FAILURE_WEBRENDER_BUG_1635186",
+        "https://bugzilla.mozilla.org/show_bug.cgi?id=1635186");
+#endif
+
     ////////////////////////////////////
     // FEATURE_WEBRENDER - ALLOWLIST