--- a/netwerk/build/nsNetCID.h
+++ b/netwerk/build/nsNetCID.h
@@ -108,16 +108,28 @@
 #define NS_STANDARDURL_CID                           \
 { /* de9472d0-8034-11d3-9399-00104ba0fd40 */         \
     0xde9472d0,                                      \
     0x8034,                                          \
     0x11d3,                                          \
     {0x93, 0x99, 0x00, 0x10, 0x4b, 0xa0, 0xfd, 0x40} \
 }
 
+// compoenent implementing nsIStandardURL, nsIURI, nsIURL
+// future replacement for nsStandardURL
+#define NS_RUSTURL_CONTRACTID \
+    "@mozilla.org/network/rust-url;1"
+#define NS_RUSTURL_CID                               \
+{ /* fd2d9f76-b34a-459e-b80e-447b03a1283a */         \
+    0xfd2d9f76,                                      \
+    0xb34a,                                          \
+    0x459e,                                          \
+    {0xb8, 0x0e, 0x44, 0x7b, 0x03, 0xa1, 0x28, 0x3a} \
+}
+
 // service implementing nsIURLParser that assumes the URL will NOT contain an
 // authority section.
 #define NS_NOAUTHURLPARSER_CONTRACTID \
     "@mozilla.org/network/url-parser;1?auth=no"
 #define NS_NOAUTHURLPARSER_CID                       \
 { /* 78804a84-8173-42b6-bb94-789f0816a810 */         \
     0x78804a84,                                      \
     0x8173,                                          \

--- a/netwerk/build/nsNetModule.cpp
+++ b/netwerk/build/nsNetModule.cpp
@@ -398,16 +398,22 @@ NS_GENERIC_FACTORY_CONSTRUCTOR(nsAuthURL
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsStdURLParser)
 
 #include "nsStandardURL.h"
 typedef mozilla::net::nsStandardURL nsStandardURL;
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsStandardURL)
 typedef mozilla::net::nsSimpleURI nsSimpleURI;
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsSimpleURI)
 
+#ifdef MOZ_RUST_URLPARSE
+#include "mozilla/net/RustURL.h"
+typedef mozilla::net::RustURL RustURL;
+NS_GENERIC_FACTORY_CONSTRUCTOR(RustURL)
+#endif // MOZ_RUST_URLPARSE
+
 typedef mozilla::net::nsSimpleNestedURI nsSimpleNestedURI;
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsSimpleNestedURI)
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "nsIDNService.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsIDNService, Init)
 
@@ -754,16 +760,19 @@ NS_DEFINE_NAMED_CID(NS_PARTIALLOCALFILEI
 NS_DEFINE_NAMED_CID(NS_ATOMICLOCALFILEOUTPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_SAFELOCALFILEOUTPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_LOCALFILESTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_INCREMENTALDOWNLOAD_CID);
 NS_DEFINE_NAMED_CID(NS_STDURLPARSER_CID);
 NS_DEFINE_NAMED_CID(NS_NOAUTHURLPARSER_CID);
 NS_DEFINE_NAMED_CID(NS_AUTHURLPARSER_CID);
 NS_DEFINE_NAMED_CID(NS_STANDARDURL_CID);
+#ifdef MOZ_RUST_URLPARSE
+NS_DEFINE_NAMED_CID(NS_RUSTURL_CID);
+#endif
 NS_DEFINE_NAMED_CID(NS_ARRAYBUFFERINPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_BUFFEREDINPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_BUFFEREDOUTPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_MIMEINPUTSTREAM_CID);
 NS_DEFINE_NAMED_CID(NS_PROTOCOLPROXYSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_STREAMCONVERTERSERVICE_CID);
 #if defined(XP_WIN)
 NS_DEFINE_NAMED_CID(NS_NAMEDPIPESERVICE_CID);
@@ -903,16 +912,19 @@ static const mozilla::Module::CIDEntry k
     { &kNS_ATOMICLOCALFILEOUTPUTSTREAM_CID, false, nullptr, nsAtomicFileOutputStreamConstructor },
     { &kNS_SAFELOCALFILEOUTPUTSTREAM_CID, false, nullptr, nsSafeFileOutputStreamConstructor },
     { &kNS_LOCALFILESTREAM_CID, false, nullptr, nsFileStreamConstructor },
     { &kNS_INCREMENTALDOWNLOAD_CID, false, nullptr, net_NewIncrementalDownload },
     { &kNS_STDURLPARSER_CID, false, nullptr, nsStdURLParserConstructor },
     { &kNS_NOAUTHURLPARSER_CID, false, nullptr, nsNoAuthURLParserConstructor },
     { &kNS_AUTHURLPARSER_CID, false, nullptr, nsAuthURLParserConstructor },
     { &kNS_STANDARDURL_CID, false, nullptr, nsStandardURLConstructor },
+#ifdef MOZ_RUST_URLPARSE
+    { &kNS_RUSTURL_CID, false, nullptr, RustURLConstructor },
+#endif
     { &kNS_ARRAYBUFFERINPUTSTREAM_CID, false, nullptr, ArrayBufferInputStreamConstructor },
     { &kNS_BUFFEREDINPUTSTREAM_CID, false, nullptr, nsBufferedInputStream::Create },
     { &kNS_BUFFEREDOUTPUTSTREAM_CID, false, nullptr, nsBufferedOutputStream::Create },
     { &kNS_MIMEINPUTSTREAM_CID, false, nullptr, nsMIMEInputStreamConstructor },
     { &kNS_PROTOCOLPROXYSERVICE_CID, true, nullptr, nsProtocolProxyServiceConstructor },
     { &kNS_STREAMCONVERTERSERVICE_CID, false, nullptr, CreateNewStreamConvServiceFactory },
 #if defined (XP_WIN)
     { &kNS_NAMEDPIPESERVICE_CID, false, NULL, mozilla::net::NamedPipeServiceConstructor },
@@ -1054,16 +1066,19 @@ static const mozilla::Module::ContractID
     { NS_ATOMICLOCALFILEOUTPUTSTREAM_CONTRACTID, &kNS_ATOMICLOCALFILEOUTPUTSTREAM_CID },
     { NS_SAFELOCALFILEOUTPUTSTREAM_CONTRACTID, &kNS_SAFELOCALFILEOUTPUTSTREAM_CID },
     { NS_LOCALFILESTREAM_CONTRACTID, &kNS_LOCALFILESTREAM_CID },
     { NS_INCREMENTALDOWNLOAD_CONTRACTID, &kNS_INCREMENTALDOWNLOAD_CID },
     { NS_STDURLPARSER_CONTRACTID, &kNS_STDURLPARSER_CID },
     { NS_NOAUTHURLPARSER_CONTRACTID, &kNS_NOAUTHURLPARSER_CID },
     { NS_AUTHURLPARSER_CONTRACTID, &kNS_AUTHURLPARSER_CID },
     { NS_STANDARDURL_CONTRACTID, &kNS_STANDARDURL_CID },
+#ifdef MOZ_RUST_URLPARSE
+    { NS_RUSTURL_CONTRACTID, &kNS_RUSTURL_CID },
+#endif
     { NS_ARRAYBUFFERINPUTSTREAM_CONTRACTID, &kNS_ARRAYBUFFERINPUTSTREAM_CID },
     { NS_BUFFEREDINPUTSTREAM_CONTRACTID, &kNS_BUFFEREDINPUTSTREAM_CID },
     { NS_BUFFEREDOUTPUTSTREAM_CONTRACTID, &kNS_BUFFEREDOUTPUTSTREAM_CID },
     { NS_MIMEINPUTSTREAM_CONTRACTID, &kNS_MIMEINPUTSTREAM_CID },
     { NS_PROTOCOLPROXYSERVICE_CONTRACTID, &kNS_PROTOCOLPROXYSERVICE_CID },
     { NS_STREAMCONVERTERSERVICE_CONTRACTID, &kNS_STREAMCONVERTERSERVICE_CID },
 #if defined(XP_WIN)
     { NS_NAMEDPIPESERVICE_CONTRACTID, &kNS_NAMEDPIPESERVICE_CID },