diff --git a/packages/core/src/lib/Config.ts b/packages/core/src/lib/Config.ts
index b5349d63..91f176a6 100644
--- a/packages/core/src/lib/Config.ts
+++ b/packages/core/src/lib/Config.ts
@@ -293,6 +293,9 @@ export class MemLabConfig {
         '--js-flags="--no-move-object-start"',
         // Alreay on by default, just want to make sure
         '--enable-precise-memory-info',
+        // sites using WebGL (three.js) will fail
+        // in headless mode without WebGL
+        '--enable-webgl',
         'browser-test',
       ],
       defaultViewport,