fixup! Bug 21952: Implement Onion-Location

Keep fragments in redirects, to fix #34366

browser/components/onionservices/OnionLocationChild.jsm

@@ -4,6 +4,8 @@
 
 var EXPORTED_SYMBOLS = ["OnionLocationChild"];
 
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
 class OnionLocationChild extends JSWindowActorChild {
   handleEvent(event) {
     this.onPageShow(event);
@@ -23,9 +25,16 @@ class OnionLocationChild extends JSWindowActorChild {
     if (aMessage.name == "OnionLocation:Refresh") {
       const doc = this.document;
       const docShell = this.docShell;
-      const onionLocationURI = doc.onionLocationURI;
+      let onionLocationURI = doc.onionLocationURI;
       const refreshURI = docShell.QueryInterface(Ci.nsIRefreshURI);
       if (onionLocationURI && refreshURI) {
+        const docUrl = new URL(doc.URL);
+        let onionUrl = new URL(onionLocationURI.asciiSpec);
+        // Keep consistent with Location
+        if (!onionUrl.hash && docUrl.hash) {
+          onionUrl.hash = docUrl.hash;
+          onionLocationURI = Services.io.newURI(onionUrl.toString());
+        }
         refreshURI.refreshURI(
           onionLocationURI,
           doc.nodePrincipal,