--- firefox-96.0.3.orig/build/moz.configure/rust.configure
+++ firefox-96.0.3/build/moz.configure/rust.configure
@@ -641,7 +643,7 @@ def rust_compile_flags(
         debug_assertions = False
 
     if debug_symbols:
-        debug_info = "2"
+        debug_info = '1'
 
     opts = []