diff --git a/node_modules/debug/package.json b/node_modules/debug/package.json
index cb67103857af1..8eea05520554e 100644
--- a/node_modules/debug/package.json
+++ b/node_modules/debug/package.json
@@ -1,6 +1,6 @@
 {
   "name": "debug",
-  "version": "4.3.5",
+  "version": "4.3.6",
   "repository": {
     "type": "git",
     "url": "git://github.com/debug-js/debug.git"
diff --git a/node_modules/debug/src/browser.js b/node_modules/debug/src/browser.js
index cd0fc35d1ee11..8d808e5889da5 100644
--- a/node_modules/debug/src/browser.js
+++ b/node_modules/debug/src/browser.js
@@ -125,6 +125,8 @@ function useColors() {
 		return false;
 	}
 
+	let m;
+
 	// Is webkit? http://stackoverflow.com/a/16459606/376773
 	// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
 	return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
@@ -132,7 +134,7 @@ function useColors() {
 		(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
 		// Is firefox >= v31?
 		// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
-		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
+		(typeof navigator !== 'undefined' && navigator.userAgent && (m = navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) && parseInt(m[1], 10) >= 31) ||
 		// Double check webkit in userAgent just in case we are in a worker
 		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
 }
diff --git a/package-lock.json b/package-lock.json
index 19cb8ef13b01c..f55a1caae3d16 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4008,9 +4008,9 @@
       }
     },
     "node_modules/debug": {
-      "version": "4.3.5",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.5.tgz",
-      "integrity": "sha512-pt0bNEmneDIvdL1Xsd9oDQ/wrQRkXDT4AUWlNZNPKvW5x/jyO9VFXkJUP07vQ2upmw5PlaITaPKc31jK13V+jg==",
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.6.tgz",
+      "integrity": "sha512-O/09Bd4Z1fBrU4VzkhFqVgpPzaGbw6Sm9FEkBT1A/YBXQFGuuSxa1dN2nxgxS34JmKXqYx8CZAwEVoJFImUXIg==",
       "inBundle": true,
       "license": "MIT",
       "dependencies": {