diff --git a/content/canvas/src/WebGLContext.cpp b/content/canvas/src/WebGLContext.cpp
index c2fb656f5fe9..9eceac232e70 100644
--- a/content/canvas/src/WebGLContext.cpp
+++ b/content/canvas/src/WebGLContext.cpp
@@ -318,23 +318,23 @@ WebGLContext::SetDimensions(PRInt32 width, PRInt32 height)
     PRBool useOpenGL = PR_TRUE;
     PRBool useANGLE = PR_TRUE;
 
-    nsCOMPtr<nsIGfxInfo> gfxInfo = do_GetService("@mozilla.org/gfx/info;1");
-    if (gfxInfo) {
-        PRInt32 status;
-        if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_WEBGL_OPENGL, &status))) {
-            if (status != nsIGfxInfo::FEATURE_STATUS_UNKNOWN &&
-                status != nsIGfxInfo::FEATURE_AVAILABLE)
-            {
-                useOpenGL = PR_FALSE;
-            }
-        }
-        if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_WEBGL_ANGLE, &status))) {
-            if (status != nsIGfxInfo::FEATURE_STATUS_UNKNOWN &&
-                status != nsIGfxInfo::FEATURE_AVAILABLE)
-            {
-                useANGLE = PR_FALSE;
-            }
-        }
+    nsCOMPtr<nsIGfxInfo> gfxInfo = do_GetService("@mozilla.org/gfx/info;1");
+    if (gfxInfo) {
+        PRInt32 status;
+        if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_WEBGL_OPENGL, &status))) {
+            if (status == nsIGfxInfo::FEATURE_BLOCKED ||
+                status == nsIGfxInfo::FEATURE_NOT_AVAILABLE)
+            {
+                useOpenGL = PR_FALSE;
+            }
+        }
+        if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_WEBGL_ANGLE, &status))) {
+            if (status == nsIGfxInfo::FEATURE_BLOCKED ||
+                status == nsIGfxInfo::FEATURE_NOT_AVAILABLE)
+            {
+                useANGLE = PR_FALSE;
+            }
+        }
     }
 
     #ifdef XP_WIN