add protocoll check

Author: FrankEssenberger

src/common/urlUtils.ts

@@ -200,8 +200,9 @@ export function completeUrlEscapingRoot(base: string | undefined, relative: stri
 
 export function isValidUrl(url: string): boolean {
   try {
-    new URL(url);
-    return true;
+    const parsed = new URL(url);
+
+    return parsed.protocol.toLowerCase() == 'http:' || parsed.protocol.toLowerCase() == 'https:';
   } catch (e) {
     return false;
   }

src/targets/browser/browserPathResolver.ts

@@ -205,7 +205,7 @@ export class BrowserSourcePathResolver extends SourcePathResolverBase<IOptions>
         defaultPathMappingResolver,
         this.logger,
       );
-      if (isValidUrl(computedSourceRoot) && isValidUrl(url)) {
+      if (isValidUrl(computedSourceRoot)) {
         return new URL(url, computedSourceRoot).href;
       }
       return properResolve(computedSourceRoot, url);