From 9e9ef38f395834190c92670a381c0c620c87c85f Mon Sep 17 00:00:00 2001
From: puckey <jonathan@puckey.studio>
Date: Wed, 31 Jan 2024 13:41:02 +0100
Subject: [PATCH] Fix firefox support (close #95, #87)

See https://github.com/Soft8Soft/detect-gpu-js/commit/b290002c004c824b84e9a03a5b7853aff1ab7bad, https://github.com/Soft8Soft/detect-gpu-js/commit/cbfbabd2f78cafe02a296bb72864dafa32d72a06
---
 src/index.ts               | 8 ++++----
 src/internal/deviceInfo.ts | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index 5fbaf0d4..e8a0eddc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -287,11 +287,11 @@ export const getGPUTier = async ({
       return toResult(0, 'WEBGL_UNSUPPORTED');
     }
 
-    const debugRendererInfo = gl.getExtension('WEBGL_debug_renderer_info');
+    const debugRendererInfo = deviceInfo?.isFirefox ? null : gl.getExtension('WEBGL_debug_renderer_info');
 
-    if (debugRendererInfo) {
-      renderer = gl.getParameter(debugRendererInfo.UNMASKED_RENDERER_WEBGL);
-    }
+    renderer = debugRendererInfo
+      ? gl.getParameter(debugRendererInfo.UNMASKED_RENDERER_WEBGL)
+      : gl.getParameter(gl.RENDERER);
 
     if (!renderer) {
       return toResult(1, 'FALLBACK');
diff --git a/src/internal/deviceInfo.ts b/src/internal/deviceInfo.ts
index 5b39d26c..2c32a1a7 100644
--- a/src/internal/deviceInfo.ts
+++ b/src/internal/deviceInfo.ts
@@ -23,5 +23,6 @@ export const deviceInfo = (() => {
     isIpad,
     isMobile: isAndroid || isIOS || isIpad,
     isSafari12: /Version\/12.+Safari/.test(userAgent),
+    isFirefox: /Firefox/.test(userAgent)
   };
 })();