fix(tests): enable software WebGL for headless firefox e2e runs

Author: Gursimrxn

playwright.config.ts

@@ -22,7 +22,22 @@ export default defineConfig({
   },
   projects: [
     { name: 'chromium', use: { ...devices['Desktop Chrome'] } },
-    { name: 'firefox', use: { ...devices['Desktop Firefox'] } },
+    {
+      name: 'firefox',
+      use: {
+        ...devices['Desktop Firefox'],
+        // Headless Firefox on Linux is software-rendering-blocklisted and
+        // cannot create WebGL contexts by default, which breaks the three
+        // example (new THREE.WebGLRenderer() throws -> no canvas). Force
+        // software WebGL so CI headless runs behave like real browsers.
+        launchOptions: {
+          firefoxUserPrefs: {
+            'webgl.disabled': false,
+            'webgl.force-enabled': true,
+          },
+        },
+      },
+    },
     { name: 'webkit', use: { ...devices['Desktop Safari'] } },
   ],
 })