1 files changed, 7 insertions, 3 deletions
diff --git a/ext/bg/js/json-schema.js b/ext/bg/js/json-schema.js
index 85ced354..7b6b9c53 100644
--- a/ext/bg/js/json-schema.js
+++ b/ext/bg/js/json-schema.js
@@ -125,7 +125,7 @@ class JsonSchemaProxyHandler {
 
 class JsonSchemaValidator {
     constructor() {
-        this._regexCache = new CacheMap(100, ([pattern, flags]) => new RegExp(pattern, flags));
+        this._regexCache = new CacheMap(100);
     }
 
     createProxy(target, schema) {
@@ -705,8 +705,12 @@ class JsonSchemaValidator {
     }
 
     _getRegex(pattern, flags) {
-        const regex = this._regexCache.getOrCreate([pattern, flags]);
-        regex.lastIndex = 0;
+        const key = `${flags}:${pattern}`;
+        let regex = this._regexCache.get(key);
+        if (typeof regex === 'undefined') {
+            regex = new RegExp(pattern, flags);
+            this._regexCache.set(key, regex);
+        }
         return regex;
     }
 }