From 6c8712c1decd7ddd1556e7fca1ac8439923ae97f Mon Sep 17 00:00:00 2001
From: Terry <187264680+gennaroterry@users.noreply.github.com>
Date: Mon, 11 Nov 2024 14:00:18 +0000
Subject: [PATCH] fix: firefox btoa compatibility for other charsets.

---
 src/shared/rewriters/html.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/shared/rewriters/html.ts b/src/shared/rewriters/html.ts
index 7fddf3f..851ed0c 100644
--- a/src/shared/rewriters/html.ts
+++ b/src/shared/rewriters/html.ts
@@ -52,10 +52,13 @@ export function rewriteHtml(
 
 		const script = (src) => new Element("script", { src });
 
+		// for compatibility purpose
+		const base64Injected = bytesToBase64(new TextEncoder().encode(injected));
+
 		head.children.unshift(
 			script($scramjet.config.files.wasm),
 			script($scramjet.config.files.shared),
-			script("data:application/javascript;base64," + btoa(injected)),
+			script("data:application/javascript;base64," + base64Injected),
 			script($scramjet.config.files.client)
 		);
 	}