diff --git a/firefox-redhat-default-prefs.js b/firefox-redhat-default-prefs.js
index 94876fa..461abb0 100644
--- a/firefox-redhat-default-prefs.js
+++ b/firefox-redhat-default-prefs.js
@@ -35,3 +35,5 @@ pref("network.trr.mode",                    5);
 /* Enable per-user policy dir, see mozbz#1583466 */
 pref("browser.policies.perUserDir",         true);
 pref("browser.gnome-search-provider.enabled",true);
+/* We're not ready yet */
+pref("widget.dmabuf-webgl.enabled", false);
\ No newline at end of file
diff --git a/firefox.spec b/firefox.spec
index 43af8fc..d1e86ef 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -962,6 +962,8 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 * Tue Aug 18 2020 Martin Stransky <stransky@redhat.com> - 80.0-1
 - Updated to 80.0 Build 2
 - Go back to gcc
+- Disabled WebGL dmabuf backend due to reported errors
+  (mzbz#1655323, mozbz#1656505).
 
 * Tue Aug 18 2020 Martin Stransky <stransky@redhat.com> - 79.0-6
 - Enabled pgo