Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

28 files changed, 5172 insertions, 0 deletions

diff --git a/toolkit/crashreporter/client/Makefile.in b/toolkit/crashreporter/client/Makefile.in
new file mode 100644
index 0000000000..a3110090b2
--- /dev/null
+++ b/toolkit/crashreporter/client/Makefile.in
@@ -0,0 +1,19 @@
+# vim:set ts=8 sw=8 sts=8 noet:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+ifeq ($(OS_ARCH),WINNT)
+MOZ_WINCONSOLE = 0
+endif
+
+include $(topsrcdir)/config/rules.mk
+
+ifeq ($(OS_ARCH),Darwin)
+libs::
+	$(NSINSTALL) -D $(DIST)/bin/crashreporter.app
+	rsync -a -C --exclude '*.in' $(srcdir)/macbuild/Contents $(DIST)/bin/crashreporter.app 
+	$(call py_action,preprocessor,-Fsubstitution --output-encoding utf-16 -DAPP_NAME='$(MOZ_APP_DISPLAYNAME)' $(srcdir)/macbuild/Contents/Resources/English.lproj/InfoPlist.strings.in -o $(DIST)/bin/crashreporter.app/Contents/Resources/English.lproj/InfoPlist.strings)
+	$(NSINSTALL) -D $(DIST)/bin/crashreporter.app/Contents/MacOS
+	$(NSINSTALL) $(DIST)/bin/crashreporter $(DIST)/bin/crashreporter.app/Contents/MacOS
+endif
diff --git a/toolkit/crashreporter/client/Throbber-small.avi b/toolkit/crashreporter/client/Throbber-small.avi
new file mode 100644
index 0000000000..640ea62c0e
--- /dev/null
+++ b/toolkit/crashreporter/client/Throbber-small.avi
diff --git a/toolkit/crashreporter/client/Throbber-small.gif b/toolkit/crashreporter/client/Throbber-small.gif
new file mode 100644
index 0000000000..cce32f20f4
--- /dev/null
+++ b/toolkit/crashreporter/client/Throbber-small.gif
diff --git a/toolkit/crashreporter/client/crashreporter.cpp b/toolkit/crashreporter/client/crashreporter.cpp
new file mode 100644
index 0000000000..4426e6446c
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter.cpp
@@ -0,0 +1,833 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "crashreporter.h"
+
+#ifdef _MSC_VER
+// Disable exception handler warnings.
+#  pragma warning(disable : 4530)
+#endif
+
+#include <fstream>
+#include <iomanip>
+#include <sstream>
+#include <memory>
+#include <ctime>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+#include <utility>
+
+#ifdef XP_LINUX
+#  include <dlfcn.h>
+#endif
+
+#include "json/json.h"
+#include "nss.h"
+#include "sechash.h"
+
+using std::ifstream;
+using std::ios;
+using std::istream;
+using std::istringstream;
+using std::ofstream;
+using std::ostream;
+using std::ostringstream;
+using std::string;
+using std::unique_ptr;
+using std::vector;
+
+namespace CrashReporter {
+
+StringTable gStrings;
+Json::Value gData;
+string gSettingsPath;
+string gEventsPath;
+string gPingPath;
+int gArgc;
+char** gArgv;
+bool gAutoSubmit;
+
+enum SubmissionResult { Succeeded, Failed };
+
+static unique_ptr<ofstream> gLogStream(nullptr);
+static string gReporterDumpFile;
+static string gExtraFile;
+static string gMemoryFile;
+
+static const char kExtraDataExtension[] = ".extra";
+static const char kMemoryReportExtension[] = ".memory.json.gz";
+
+void UIError(const string& message) {
+  if (gAutoSubmit) {
+    return;
+  }
+
+  string errorMessage;
+  if (!gStrings[ST_CRASHREPORTERERROR].empty()) {
+    char buf[2048];
+    snprintf(buf, 2048, gStrings[ST_CRASHREPORTERERROR].c_str(),
+             message.c_str());
+    errorMessage = buf;
+  } else {
+    errorMessage = message;
+  }
+
+  UIError_impl(errorMessage);
+}
+
+static string Unescape(const string& str) {
+  string ret;
+  for (string::const_iterator iter = str.begin(); iter != str.end(); iter++) {
+    if (*iter == '\\') {
+      iter++;
+      if (*iter == '\\') {
+        ret.push_back('\\');
+      } else if (*iter == 'n') {
+        ret.push_back('\n');
+      } else if (*iter == 't') {
+        ret.push_back('\t');
+      }
+    } else {
+      ret.push_back(*iter);
+    }
+  }
+
+  return ret;
+}
+
+bool ReadStrings(istream& in, StringTable& strings, bool unescape) {
+  string currentSection;
+  while (!in.eof()) {
+    string line;
+    std::getline(in, line);
+    int sep = line.find('=');
+    if (sep >= 0) {
+      string key, value;
+      key = line.substr(0, sep);
+      value = line.substr(sep + 1);
+      if (unescape) value = Unescape(value);
+      strings[key] = value;
+    }
+  }
+
+  return true;
+}
+
+bool ReadStringsFromFile(const string& path, StringTable& strings,
+                         bool unescape) {
+  ifstream* f = UIOpenRead(path, ios::in);
+  bool success = false;
+  if (f->is_open()) {
+    success = ReadStrings(*f, strings, unescape);
+    f->close();
+  }
+
+  delete f;
+  return success;
+}
+
+static bool ReadExtraFile(const string& aExtraDataPath, Json::Value& aExtra) {
+  bool success = false;
+  ifstream* f = UIOpenRead(aExtraDataPath, ios::in);
+  if (f->is_open()) {
+    Json::CharReaderBuilder builder;
+    success = parseFromStream(builder, *f, &aExtra, nullptr);
+  }
+
+  delete f;
+  return success;
+}
+
+static string Basename(const string& file) {
+  string::size_type slashIndex = file.rfind(UI_DIR_SEPARATOR);
+  if (slashIndex != string::npos) {
+    return file.substr(slashIndex + 1);
+  }
+  return file;
+}
+
+static bool ReadEventFile(const string& aPath, string& aEventVersion,
+                          string& aTime, string& aUuid, Json::Value& aData) {
+  bool res = false;
+  ifstream* f = UIOpenRead(aPath, ios::binary);
+
+  if (f->is_open()) {
+    std::getline(*f, aEventVersion, '\n');
+    res = f->good();
+    std::getline(*f, aTime, '\n');
+    res &= f->good();
+    std::getline(*f, aUuid, '\n');
+    res &= f->good();
+
+    if (res) {
+      Json::CharReaderBuilder builder;
+      res = parseFromStream(builder, *f, &aData, nullptr);
+    }
+  }
+
+  delete f;
+  return res;
+}
+
+static void OverwriteEventFile(const string& aPath, const string& aEventVersion,
+                               const string& aTime, const string& aUuid,
+                               const Json::Value& aData) {
+  ofstream* f = UIOpenWrite(aPath, ios::binary | ios::trunc);
+  if (f->is_open()) {
+    f->write(aEventVersion.c_str(), aEventVersion.length()) << '\n';
+    f->write(aTime.c_str(), aTime.length()) << '\n';
+    f->write(aUuid.c_str(), aUuid.length()) << '\n';
+
+    Json::StreamWriterBuilder builder;
+    builder["indentation"] = "";
+    std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+    writer->write(aData, f);
+    *f << "\n";
+  }
+
+  delete f;
+}
+
+static void UpdateEventFile(const Json::Value& aExtraData, const string& aHash,
+                            const string& aPingUuid) {
+  if (gEventsPath.empty()) {
+    // If there is no path for finding the crash event, skip this step.
+    return;
+  }
+
+  string localId = CrashReporter::GetDumpLocalID();
+  string path = gEventsPath + UI_DIR_SEPARATOR + localId;
+  string eventVersion;
+  string crashTime;
+  string crashUuid;
+  Json::Value eventData;
+
+  if (!ReadEventFile(path, eventVersion, crashTime, crashUuid, eventData)) {
+    return;
+  }
+
+  if (!aHash.empty()) {
+    eventData["MinidumpSha256Hash"] = aHash;
+  }
+
+  if (!aPingUuid.empty()) {
+    eventData["CrashPingUUID"] = aPingUuid;
+  }
+
+  if (aExtraData.isMember("StackTraces")) {
+    eventData["StackTraces"] = aExtraData["StackTraces"];
+  }
+
+  OverwriteEventFile(path, eventVersion, crashTime, crashUuid, eventData);
+}
+
+static void WriteSubmissionEvent(SubmissionResult result,
+                                 const string& remoteId) {
+  if (gEventsPath.empty()) {
+    // If there is no path for writing the submission event, skip it.
+    return;
+  }
+
+  string localId = CrashReporter::GetDumpLocalID();
+  string fpath = gEventsPath + UI_DIR_SEPARATOR + localId + "-submission";
+  ofstream* f = UIOpenWrite(fpath, ios::binary);
+  time_t tm;
+  time(&tm);
+
+  if (f->is_open()) {
+    *f << "crash.submission.1\n";
+    *f << tm << "\n";
+    *f << localId << "\n";
+    *f << (result == Succeeded ? "true" : "false") << "\n";
+    *f << remoteId;
+
+    f->close();
+  }
+
+  delete f;
+}
+
+void LogMessage(const std::string& message) {
+  if (gLogStream.get()) {
+    char date[64];
+    time_t tm;
+    time(&tm);
+    if (strftime(date, sizeof(date) - 1, "%c", localtime(&tm)) == 0)
+      date[0] = '\0';
+    (*gLogStream) << "[" << date << "] " << message << std::endl;
+  }
+}
+
+static void OpenLogFile() {
+  string logPath = gSettingsPath + UI_DIR_SEPARATOR + "submit.log";
+  gLogStream.reset(UIOpenWrite(logPath, ios::app));
+}
+
+static bool ReadConfig() {
+  string iniPath;
+  if (!UIGetIniPath(iniPath)) {
+    return false;
+  }
+
+  if (!ReadStringsFromFile(iniPath, gStrings, true)) return false;
+
+  // See if we have a string override file, if so process it
+  char* overrideEnv = getenv("MOZ_CRASHREPORTER_STRINGS_OVERRIDE");
+  if (overrideEnv && *overrideEnv && UIFileExists(overrideEnv))
+    ReadStringsFromFile(overrideEnv, gStrings, true);
+
+  return true;
+}
+
+static string GetAdditionalFilename(const string& dumpfile,
+                                    const char* extension) {
+  string filename(dumpfile);
+  int dot = filename.rfind('.');
+  if (dot < 0) return "";
+
+  filename.replace(dot, filename.length() - dot, extension);
+  return filename;
+}
+
+static bool MoveCrashData(const string& toDir, string& dumpfile,
+                          string& extrafile, string& memoryfile) {
+  if (!UIEnsurePathExists(toDir)) {
+    UIError(gStrings[ST_ERROR_CREATEDUMPDIR]);
+    return false;
+  }
+
+  string newDump = toDir + UI_DIR_SEPARATOR + Basename(dumpfile);
+  string newExtra = toDir + UI_DIR_SEPARATOR + Basename(extrafile);
+  string newMemory = toDir + UI_DIR_SEPARATOR + Basename(memoryfile);
+
+  if (!UIMoveFile(dumpfile, newDump)) {
+    UIError(gStrings[ST_ERROR_DUMPFILEMOVE]);
+    return false;
+  }
+
+  if (!UIMoveFile(extrafile, newExtra)) {
+    UIError(gStrings[ST_ERROR_EXTRAFILEMOVE]);
+    return false;
+  }
+
+  if (!memoryfile.empty()) {
+    // Ignore errors from moving the memory file
+    if (!UIMoveFile(memoryfile, newMemory)) {
+      UIDeleteFile(memoryfile);
+      newMemory.erase();
+    }
+    memoryfile = newMemory;
+  }
+
+  dumpfile = newDump;
+  extrafile = newExtra;
+
+  return true;
+}
+
+static bool AddSubmittedReport(const string& serverResponse) {
+  StringTable responseItems;
+  istringstream in(serverResponse);
+  ReadStrings(in, responseItems, false);
+
+  if (responseItems.find("StopSendingReportsFor") != responseItems.end()) {
+    // server wants to tell us to stop sending reports for a certain version
+    string reportPath = gSettingsPath + UI_DIR_SEPARATOR + "EndOfLife" +
+                        responseItems["StopSendingReportsFor"];
+
+    ofstream* reportFile = UIOpenWrite(reportPath, ios::trunc);
+    if (reportFile->is_open()) {
+      // don't really care about the contents
+      *reportFile << 1 << "\n";
+      reportFile->close();
+    }
+    delete reportFile;
+  }
+
+  if (responseItems.find("Discarded") != responseItems.end()) {
+    // server discarded this report... save it so the user can resubmit it
+    // manually
+    return false;
+  }
+
+  if (responseItems.find("CrashID") == responseItems.end()) return false;
+
+  string submittedDir = gSettingsPath + UI_DIR_SEPARATOR + "submitted";
+  if (!UIEnsurePathExists(submittedDir)) {
+    return false;
+  }
+
+  string path =
+      submittedDir + UI_DIR_SEPARATOR + responseItems["CrashID"] + ".txt";
+
+  ofstream* file = UIOpenWrite(path, ios::trunc);
+  if (!file->is_open()) {
+    delete file;
+    return false;
+  }
+
+  char buf[1024];
+  snprintf(buf, 1024, gStrings["CrashID"].c_str(),
+           responseItems["CrashID"].c_str());
+  *file << buf << "\n";
+
+  if (responseItems.find("ViewURL") != responseItems.end()) {
+    snprintf(buf, 1024, gStrings["CrashDetailsURL"].c_str(),
+             responseItems["ViewURL"].c_str());
+    *file << buf << "\n";
+  }
+
+  file->close();
+  delete file;
+
+  WriteSubmissionEvent(Succeeded, responseItems["CrashID"]);
+  return true;
+}
+
+void DeleteDump() {
+  const char* noDelete = getenv("MOZ_CRASHREPORTER_NO_DELETE_DUMP");
+  if (!noDelete || *noDelete == '\0') {
+    if (!gReporterDumpFile.empty()) UIDeleteFile(gReporterDumpFile);
+    if (!gExtraFile.empty()) UIDeleteFile(gExtraFile);
+    if (!gMemoryFile.empty()) UIDeleteFile(gMemoryFile);
+  }
+}
+
+void SendCompleted(bool success, const string& serverResponse) {
+  if (success) {
+    if (AddSubmittedReport(serverResponse)) {
+      DeleteDump();
+    } else {
+      string directory = gReporterDumpFile;
+      int slashpos = directory.find_last_of("/\\");
+      if (slashpos < 2) return;
+      directory.resize(slashpos);
+      UIPruneSavedDumps(directory);
+      WriteSubmissionEvent(Failed, "");
+    }
+  } else {
+    WriteSubmissionEvent(Failed, "");
+  }
+}
+
+static string ComputeDumpHash() {
+#ifdef XP_LINUX
+  // On Linux we rely on the system-provided libcurl which uses nss so we have
+  // to also use the system-provided nss instead of the ones we have bundled.
+  const char* libnssNames[] = {
+      "libnss3.so",
+#  ifndef HAVE_64BIT_BUILD
+      // 32-bit versions on 64-bit hosts
+      "/usr/lib32/libnss3.so",
+#  endif
+  };
+  void* lib = nullptr;
+
+  for (const char* libname : libnssNames) {
+    lib = dlopen(libname, RTLD_NOW);
+
+    if (lib) {
+      break;
+    }
+  }
+
+  if (!lib) {
+    return "";
+  }
+
+  SECStatus (*NSS_Initialize)(const char*, const char*, const char*,
+                              const char*, PRUint32);
+  HASHContext* (*HASH_Create)(HASH_HashType);
+  void (*HASH_Destroy)(HASHContext*);
+  void (*HASH_Begin)(HASHContext*);
+  void (*HASH_Update)(HASHContext*, const unsigned char*, unsigned int);
+  void (*HASH_End)(HASHContext*, unsigned char*, unsigned int*, unsigned int);
+
+  *(void**)(&NSS_Initialize) = dlsym(lib, "NSS_Initialize");
+  *(void**)(&HASH_Create) = dlsym(lib, "HASH_Create");
+  *(void**)(&HASH_Destroy) = dlsym(lib, "HASH_Destroy");
+  *(void**)(&HASH_Begin) = dlsym(lib, "HASH_Begin");
+  *(void**)(&HASH_Update) = dlsym(lib, "HASH_Update");
+  *(void**)(&HASH_End) = dlsym(lib, "HASH_End");
+
+  if (!HASH_Create || !HASH_Destroy || !HASH_Begin || !HASH_Update ||
+      !HASH_End) {
+    return "";
+  }
+#endif
+  // Minimal NSS initialization so we can use the hash functions
+  const PRUint32 kNssFlags = NSS_INIT_READONLY | NSS_INIT_NOROOTINIT |
+                             NSS_INIT_NOMODDB | NSS_INIT_NOCERTDB;
+  if (NSS_Initialize(nullptr, "", "", "", kNssFlags) != SECSuccess) {
+    return "";
+  }
+
+  HASHContext* hashContext = HASH_Create(HASH_AlgSHA256);
+
+  if (!hashContext) {
+    return "";
+  }
+
+  HASH_Begin(hashContext);
+
+  ifstream* f = UIOpenRead(gReporterDumpFile, ios::binary);
+  bool error = false;
+
+  // Read the minidump contents
+  if (f->is_open()) {
+    uint8_t buff[4096];
+
+    do {
+      f->read((char*)buff, sizeof(buff));
+
+      if (f->bad()) {
+        error = true;
+        break;
+      }
+
+      HASH_Update(hashContext, buff, f->gcount());
+    } while (!f->eof());
+
+    f->close();
+  } else {
+    error = true;
+  }
+
+  delete f;
+
+  // Finalize the hash computation
+  uint8_t result[SHA256_LENGTH];
+  uint32_t resultLen = 0;
+
+  HASH_End(hashContext, result, &resultLen, SHA256_LENGTH);
+
+  if (resultLen != SHA256_LENGTH) {
+    error = true;
+  }
+
+  HASH_Destroy(hashContext);
+
+  if (!error) {
+    ostringstream hash;
+
+    for (size_t i = 0; i < SHA256_LENGTH; i++) {
+      hash << std::setw(2) << std::setfill('0') << std::hex
+           << static_cast<unsigned int>(result[i]);
+    }
+
+    return hash.str();
+  }
+  return "";  // If we encountered an error, return an empty hash
+}
+
+string GetDumpLocalID() {
+  string localId = Basename(gReporterDumpFile);
+  string::size_type dot = localId.rfind('.');
+
+  if (dot == string::npos) return "";
+
+  return localId.substr(0, dot);
+}
+
+string GetProgramPath(const string& exename) {
+  string path = gArgv[0];
+  size_t pos = path.rfind(UI_CRASH_REPORTER_FILENAME BIN_SUFFIX);
+  path.erase(pos);
+#ifdef XP_MACOSX
+  // On macOS the crash reporter client is shipped as an application bundle
+  // contained within Firefox' main application bundle. So when it's invoked
+  // its current working directory looks like:
+  // Firefox.app/Contents/MacOS/crashreporter.app/Contents/MacOS/
+  // The other applications we ship with Firefox are stored in the main bundle
+  // (Firefox.app/Contents/MacOS/) so we we need to go back three directories
+  // to reach them.
+  path.append("../../../");
+#endif  // XP_MACOSX
+  path.append(exename + BIN_SUFFIX);
+
+  return path;
+}
+
+}  // namespace CrashReporter
+
+using namespace CrashReporter;
+
+Json::Value kEmptyJsonString("");
+
+void RewriteStrings(Json::Value& aExtraData) {
+  // rewrite some UI strings with the values from the query parameters
+  string product = aExtraData.get("ProductName", kEmptyJsonString).asString();
+  Json::Value mozilla("Mozilla");
+  string vendor = aExtraData.get("Vendor", mozilla).asString();
+
+  char buf[4096];
+  snprintf(buf, sizeof(buf), gStrings[ST_CRASHREPORTERVENDORTITLE].c_str(),
+           vendor.c_str());
+  gStrings[ST_CRASHREPORTERTITLE] = buf;
+
+  string str = gStrings[ST_CRASHREPORTERPRODUCTERROR];
+  // Only do the replacement here if the string has two
+  // format specifiers to start.  Otherwise
+  // we assume it has the product name hardcoded.
+  string::size_type pos = str.find("%s");
+  if (pos != string::npos) pos = str.find("%s", pos + 2);
+  if (pos != string::npos) {
+    // Leave a format specifier for UIError to fill in
+    snprintf(buf, sizeof(buf), gStrings[ST_CRASHREPORTERPRODUCTERROR].c_str(),
+             product.c_str(), "%s");
+    gStrings[ST_CRASHREPORTERERROR] = buf;
+  } else {
+    // product name is hardcoded
+    gStrings[ST_CRASHREPORTERERROR] = str;
+  }
+
+  snprintf(buf, sizeof(buf), gStrings[ST_CRASHREPORTERDESCRIPTION].c_str(),
+           product.c_str());
+  gStrings[ST_CRASHREPORTERDESCRIPTION] = buf;
+
+  snprintf(buf, sizeof(buf), gStrings[ST_CHECKSUBMIT].c_str(), vendor.c_str());
+  gStrings[ST_CHECKSUBMIT] = buf;
+
+  snprintf(buf, sizeof(buf), gStrings[ST_RESTART].c_str(), product.c_str());
+  gStrings[ST_RESTART] = buf;
+
+  snprintf(buf, sizeof(buf), gStrings[ST_QUIT].c_str(), product.c_str());
+  gStrings[ST_QUIT] = buf;
+
+  snprintf(buf, sizeof(buf), gStrings[ST_ERROR_ENDOFLIFE].c_str(),
+           product.c_str());
+  gStrings[ST_ERROR_ENDOFLIFE] = buf;
+}
+
+bool CheckEndOfLifed(const Json::Value& aVersion) {
+  if (!aVersion.isString()) {
+    return false;
+  }
+
+  string reportPath =
+      gSettingsPath + UI_DIR_SEPARATOR + "EndOfLife" + aVersion.asString();
+  return UIFileExists(reportPath);
+}
+
+int main(int argc, char** argv) {
+  gArgc = argc;
+  gArgv = argv;
+
+  string autoSubmitEnv = UIGetEnv("MOZ_CRASHREPORTER_AUTO_SUBMIT");
+  gAutoSubmit = !autoSubmitEnv.empty();
+
+  if (!ReadConfig()) {
+    UIError("Couldn't read configuration.");
+    return 0;
+  }
+
+  if (!UIInit()) {
+    return 0;
+  }
+
+  if (argc > 1) {
+    gReporterDumpFile = argv[1];
+  }
+
+  if (gReporterDumpFile.empty()) {
+    // no dump file specified, run the default UI
+    if (!gAutoSubmit) {
+      UIShowDefaultUI();
+    }
+  } else {
+    // Start by running minidump analyzer to gather stack traces.
+    string reporterDumpFile = gReporterDumpFile;
+    vector<string> args = {reporterDumpFile};
+    string dumpAllThreadsEnv = UIGetEnv("MOZ_CRASHREPORTER_DUMP_ALL_THREADS");
+    if (!dumpAllThreadsEnv.empty()) {
+      args.insert(args.begin(), "--full");
+    }
+    UIRunProgram(CrashReporter::GetProgramPath(UI_MINIDUMP_ANALYZER_FILENAME),
+                 args,
+                 /* wait */ true);
+
+    // go ahead with the crash reporter
+    gExtraFile = GetAdditionalFilename(gReporterDumpFile, kExtraDataExtension);
+    if (gExtraFile.empty()) {
+      UIError(gStrings[ST_ERROR_BADARGUMENTS]);
+      return 0;
+    }
+
+    if (!UIFileExists(gExtraFile)) {
+      UIError(gStrings[ST_ERROR_EXTRAFILEEXISTS]);
+      return 0;
+    }
+
+    gMemoryFile =
+        GetAdditionalFilename(gReporterDumpFile, kMemoryReportExtension);
+    if (!UIFileExists(gMemoryFile)) {
+      gMemoryFile.erase();
+    }
+
+    Json::Value extraData;
+    if (!ReadExtraFile(gExtraFile, extraData)) {
+      UIError(gStrings[ST_ERROR_EXTRAFILEREAD]);
+      return 0;
+    }
+
+    if (!extraData.isMember("ProductName")) {
+      UIError(gStrings[ST_ERROR_NOPRODUCTNAME]);
+      return 0;
+    }
+
+    // There is enough information in the extra file to rewrite strings
+    // to be product specific
+    RewriteStrings(extraData);
+
+    if (!extraData.isMember("ServerURL")) {
+      UIError(gStrings[ST_ERROR_NOSERVERURL]);
+      return 0;
+    }
+
+    // Hopefully the settings path exists in the environment. Try that before
+    // asking the platform-specific code to guess.
+    gSettingsPath = UIGetEnv("MOZ_CRASHREPORTER_DATA_DIRECTORY");
+    if (gSettingsPath.empty()) {
+      string product =
+          extraData.get("ProductName", kEmptyJsonString).asString();
+      string vendor = extraData.get("Vendor", kEmptyJsonString).asString();
+
+      if (!UIGetSettingsPath(vendor, product, gSettingsPath)) {
+        gSettingsPath.clear();
+      }
+    }
+
+    if (gSettingsPath.empty() || !UIEnsurePathExists(gSettingsPath)) {
+      UIError(gStrings[ST_ERROR_NOSETTINGSPATH]);
+      return 0;
+    }
+
+    OpenLogFile();
+
+    gEventsPath = UIGetEnv("MOZ_CRASHREPORTER_EVENTS_DIRECTORY");
+    gPingPath = UIGetEnv("MOZ_CRASHREPORTER_PING_DIRECTORY");
+
+    // Assemble and send the crash ping
+    string hash = ComputeDumpHash();
+
+    string pingUuid;
+    SendCrashPing(extraData, hash, pingUuid, gPingPath);
+    UpdateEventFile(extraData, hash, pingUuid);
+
+    if (!UIFileExists(gReporterDumpFile)) {
+      UIError(gStrings[ST_ERROR_DUMPFILEEXISTS]);
+      return 0;
+    }
+
+    string pendingDir = gSettingsPath + UI_DIR_SEPARATOR + "pending";
+    if (!MoveCrashData(pendingDir, gReporterDumpFile, gExtraFile,
+                       gMemoryFile)) {
+      return 0;
+    }
+
+    string sendURL = extraData.get("ServerURL", kEmptyJsonString).asString();
+    // we don't need to actually send these
+    extraData.removeMember("ServerURL");
+    extraData.removeMember("StackTraces");
+
+    extraData["SubmittedFrom"] = "Client";
+    extraData["Throttleable"] = "1";
+
+    // re-set XUL_APP_FILE for xulrunner wrapped apps
+    const char* appfile = getenv("MOZ_CRASHREPORTER_RESTART_XUL_APP_FILE");
+    if (appfile && *appfile) {
+      const char prefix[] = "XUL_APP_FILE=";
+      char* env = (char*)malloc(strlen(appfile) + strlen(prefix) + 1);
+      if (!env) {
+        UIError("Out of memory");
+        return 0;
+      }
+      strcpy(env, prefix);
+      strcat(env, appfile);
+      putenv(env);
+      free(env);
+    }
+
+    vector<string> restartArgs;
+
+    ostringstream paramName;
+    int i = 0;
+    paramName << "MOZ_CRASHREPORTER_RESTART_ARG_" << i++;
+    const char* param = getenv(paramName.str().c_str());
+    while (param && *param) {
+      restartArgs.push_back(param);
+
+      paramName.str("");
+      paramName << "MOZ_CRASHREPORTER_RESTART_ARG_" << i++;
+      param = getenv(paramName.str().c_str());
+    }
+
+    // allow override of the server url via environment variable
+    // XXX: remove this in the far future when our robot
+    // masters force everyone to use XULRunner
+    char* urlEnv = getenv("MOZ_CRASHREPORTER_URL");
+    if (urlEnv && *urlEnv) {
+      sendURL = urlEnv;
+    }
+
+    // see if this version has been end-of-lifed
+
+    if (extraData.isMember("Version") &&
+        CheckEndOfLifed(extraData["Version"])) {
+      UIError(gStrings[ST_ERROR_ENDOFLIFE]);
+      DeleteDump();
+      return 0;
+    }
+
+    StringTable files;
+    files["upload_file_minidump"] = gReporterDumpFile;
+    if (!gMemoryFile.empty()) {
+      files["memory_report"] = gMemoryFile;
+    }
+
+    if (!UIShowCrashUI(files, extraData, sendURL, restartArgs)) {
+      DeleteDump();
+    }
+  }
+
+  UIShutdown();
+
+  return 0;
+}
+
+#if defined(XP_WIN) && !defined(__GNUC__)
+#  include <windows.h>
+
+// We need WinMain in order to not be a console app.  This function is unused
+// if we are a console application.
+int WINAPI wWinMain(HINSTANCE, HINSTANCE, LPWSTR args, int) {
+  // Remove everything except close window from the context menu
+  {
+    HKEY hkApp;
+    RegCreateKeyExW(HKEY_CURRENT_USER, L"Software\\Classes\\Applications", 0,
+                    nullptr, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, nullptr,
+                    &hkApp, nullptr);
+    RegCloseKey(hkApp);
+    if (RegCreateKeyExW(HKEY_CURRENT_USER,
+                        L"Software\\Classes\\Applications\\crashreporter.exe",
+                        0, nullptr, REG_OPTION_VOLATILE, KEY_SET_VALUE, nullptr,
+                        &hkApp, nullptr) == ERROR_SUCCESS) {
+      RegSetValueExW(hkApp, L"IsHostApp", 0, REG_NONE, 0, 0);
+      RegSetValueExW(hkApp, L"NoOpenWith", 0, REG_NONE, 0, 0);
+      RegSetValueExW(hkApp, L"NoStartPage", 0, REG_NONE, 0, 0);
+      RegCloseKey(hkApp);
+    }
+  }
+
+  char** argv = static_cast<char**>(malloc(__argc * sizeof(char*)));
+  for (int i = 0; i < __argc; i++) {
+    argv[i] = strdup(WideToUTF8(__wargv[i]).c_str());
+  }
+
+  // Do the real work.
+  return main(__argc, argv);
+}
+#endif
diff --git a/toolkit/crashreporter/client/crashreporter.exe.manifest b/toolkit/crashreporter/client/crashreporter.exe.manifest
new file mode 100644
index 0000000000..81aa1465c6
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter.exe.manifest
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+<assemblyIdentity
+        version="1.0.0.0"
+        processorArchitecture="*"
+        name="CrashReporter"
+        type="win32"
+/>
+<description>Crash Reporter</description>
+<dependency>
+        <dependentAssembly>
+                <assemblyIdentity
+                        type="win32"
+                        name="Microsoft.Windows.Common-Controls"
+                        version="6.0.0.0"
+                        processorArchitecture="*"
+                        publicKeyToken="6595b64144ccf1df"
+                        language="*"
+                />
+        </dependentAssembly>
+</dependency>
+<ms_asmv3:trustInfo xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
+  <ms_asmv3:security>
+    <ms_asmv3:requestedPrivileges>
+      <ms_asmv3:requestedExecutionLevel level="asInvoker" uiAccess="false" />
+    </ms_asmv3:requestedPrivileges>
+  </ms_asmv3:security>
+</ms_asmv3:trustInfo>
+  <ms_asmv3:application xmlns:ms_asmv3="urn:schemas-microsoft-com:asm.v3">
+    <ms_asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
+      <gdiScaling xmlns="http://schemas.microsoft.com/SMI/2017/WindowsSettings">true</gdiScaling>
+    </ms_asmv3:windowsSettings>
+  </ms_asmv3:application>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+    </application>
+  </compatibility>
+</assembly>
diff --git a/toolkit/crashreporter/client/crashreporter.h b/toolkit/crashreporter/client/crashreporter.h
new file mode 100644
index 0000000000..d0ac7a8626
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter.h
@@ -0,0 +1,159 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CRASHREPORTER_H__
+#define CRASHREPORTER_H__
+
+#ifdef _MSC_VER
+#  pragma warning(push)
+// Disable exception handler warnings.
+#  pragma warning(disable : 4530)
+#endif
+
+#include <string>
+#include <map>
+#include <vector>
+#include <stdlib.h>
+#include <stdio.h>
+#include <iostream>
+#include <fstream>
+
+#define MAX_COMMENT_LENGTH 10000
+
+#if defined(XP_WIN)
+
+#  include <windows.h>
+
+#  define UI_DIR_SEPARATOR "\\"
+
+std::string WideToUTF8(const std::wstring& wide, bool* success = 0);
+
+#else
+
+#  define UI_DIR_SEPARATOR "/"
+
+#endif
+
+#include "json/json.h"
+
+#define UI_CRASH_REPORTER_FILENAME "crashreporter"
+#define UI_MINIDUMP_ANALYZER_FILENAME "minidump-analyzer"
+#define UI_PING_SENDER_FILENAME "pingsender"
+
+typedef std::map<std::string, std::string> StringTable;
+
+#define ST_CRASHREPORTERTITLE "CrashReporterTitle"
+#define ST_CRASHREPORTERVENDORTITLE "CrashReporterVendorTitle"
+#define ST_CRASHREPORTERERROR "CrashReporterErrorText"
+#define ST_CRASHREPORTERPRODUCTERROR "CrashReporterProductErrorText2"
+#define ST_CRASHREPORTERHEADER "CrashReporterSorry"
+#define ST_CRASHREPORTERDESCRIPTION "CrashReporterDescriptionText2"
+#define ST_CRASHREPORTERDEFAULT "CrashReporterDefault"
+#define ST_VIEWREPORT "Details"
+#define ST_VIEWREPORTTITLE "ViewReportTitle"
+#define ST_COMMENTGRAYTEXT "CommentGrayText"
+#define ST_EXTRAREPORTINFO "ExtraReportInfo"
+#define ST_CHECKSUBMIT "CheckSendReport"
+#define ST_CHECKURL "CheckIncludeURL"
+#define ST_REPORTPRESUBMIT "ReportPreSubmit2"
+#define ST_REPORTDURINGSUBMIT "ReportDuringSubmit2"
+#define ST_REPORTSUBMITSUCCESS "ReportSubmitSuccess"
+#define ST_SUBMITFAILED "ReportSubmitFailed"
+#define ST_QUIT "Quit2"
+#define ST_RESTART "Restart"
+#define ST_OK "Ok"
+#define ST_CLOSE "Close"
+
+#define ST_ERROR_BADARGUMENTS "ErrorBadArguments"
+#define ST_ERROR_EXTRAFILEEXISTS "ErrorExtraFileExists"
+#define ST_ERROR_EXTRAFILEREAD "ErrorExtraFileRead"
+#define ST_ERROR_EXTRAFILEMOVE "ErrorExtraFileMove"
+#define ST_ERROR_DUMPFILEEXISTS "ErrorDumpFileExists"
+#define ST_ERROR_DUMPFILEMOVE "ErrorDumpFileMove"
+#define ST_ERROR_NOPRODUCTNAME "ErrorNoProductName"
+#define ST_ERROR_NOSERVERURL "ErrorNoServerURL"
+#define ST_ERROR_NOSETTINGSPATH "ErrorNoSettingsPath"
+#define ST_ERROR_CREATEDUMPDIR "ErrorCreateDumpDir"
+#define ST_ERROR_ENDOFLIFE "ErrorEndOfLife"
+
+//=============================================================================
+// implemented in crashreporter.cpp and ping.cpp
+//=============================================================================
+
+namespace CrashReporter {
+extern StringTable gStrings;
+extern std::string gSettingsPath;
+extern std::string gEventsPath;
+extern int gArgc;
+extern char** gArgv;
+extern bool gAutoSubmit;
+
+void UIError(const std::string& message);
+
+// The UI finished sending the report
+void SendCompleted(bool success, const std::string& serverResponse);
+
+bool ReadStrings(std::istream& in, StringTable& strings, bool unescape);
+bool ReadStringsFromFile(const std::string& path, StringTable& strings,
+                         bool unescape);
+void LogMessage(const std::string& message);
+void DeleteDump();
+
+std::string GetDumpLocalID();
+std::string GetProgramPath(const std::string& exename);
+
+// Telemetry ping
+bool SendCrashPing(Json::Value& extra, const std::string& hash,
+                   std::string& pingUuid, const std::string& pingDir);
+
+static const unsigned int kSaveCount = 10;
+}  // namespace CrashReporter
+
+//=============================================================================
+// implemented in the platform-specific files
+//=============================================================================
+
+bool UIInit();
+void UIShutdown();
+
+// Run the UI for when the app was launched without a dump file
+void UIShowDefaultUI();
+
+// Run the UI for when the app was launched with a dump file
+// Return true if the user sent (or tried to send) the crash report,
+// false if they chose not to, and it should be deleted.
+bool UIShowCrashUI(const StringTable& files, const Json::Value& queryParameters,
+                   const std::string& sendURL,
+                   const std::vector<std::string>& restartArgs);
+
+void UIError_impl(const std::string& message);
+
+bool UIGetIniPath(std::string& path);
+bool UIGetSettingsPath(const std::string& vendor, const std::string& product,
+                       std::string& settingsPath);
+bool UIEnsurePathExists(const std::string& path);
+bool UIFileExists(const std::string& path);
+bool UIMoveFile(const std::string& oldfile, const std::string& newfile);
+bool UIDeleteFile(const std::string& oldfile);
+std::ifstream* UIOpenRead(const std::string& filename,
+                          std::ios_base::openmode mode);
+std::ofstream* UIOpenWrite(const std::string& filename,
+                           std::ios_base::openmode mode);
+void UIPruneSavedDumps(const std::string& directory);
+
+// Run the program specified by exename, passing it the parameters in arg.
+// If wait is true, wait for the program to terminate execution before
+// returning. Returns true if the program was launched correctly, false
+// otherwise.
+bool UIRunProgram(const std::string& exename,
+                  const std::vector<std::string>& args, bool wait = false);
+
+// Read the environment variable specified by name
+std::string UIGetEnv(const std::string& name);
+
+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+
+#endif
diff --git a/toolkit/crashreporter/client/crashreporter.ico b/toolkit/crashreporter/client/crashreporter.ico
new file mode 100644
index 0000000000..29ac3c6189
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter.ico
diff --git a/toolkit/crashreporter/client/crashreporter.rc b/toolkit/crashreporter/client/crashreporter.rc
new file mode 100755
index 0000000000..f6042bf2e5
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter.rc
@@ -0,0 +1,143 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winresrc.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""winresrc.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_MAINICON            ICON                    "crashreporter.ico"
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// AVI
+//
+
+IDR_THROBBER            AVI                     "Throbber-small.avi"
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Dialog
+//
+
+IDD_SENDDIALOG DIALOGEX 0, 0, 241, 187
+STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
+EXSTYLE WS_EX_APPWINDOW
+CAPTION "Sending Crash Report..."
+FONT 8, "MS Shell Dlg", 400, 0, 0x1
+BEGIN
+    CONTROL         "",IDC_DESCRIPTIONTEXT,"RICHEDIT50W",ES_MULTILINE | ES_READONLY,8,7,226,12,WS_EX_TRANSPARENT
+    CONTROL         "tell mozilla about this crash so they can fix it",IDC_SUBMITREPORTCHECK,
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,12,25,222,10
+    CHECKBOX        "details...",IDC_VIEWREPORTBUTTON,24,40,54,14,BS_PUSHLIKE
+    EDITTEXT        IDC_COMMENTTEXT,24,59,210,43,ES_MULTILINE | ES_WANTRETURN | WS_VSCROLL
+    CONTROL         "include the address of the page i was on",IDC_INCLUDEURLCHECK,
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,24,107,210,10
+    CONTROL         "",IDC_THROBBER,"SysAnimate32",ACS_TRANSPARENT | NOT WS_VISIBLE | WS_TABSTOP,4,152,16,16
+    LTEXT           "your crash report will be submitted when you restart",IDC_PROGRESSTEXT,24,152,210,10,SS_NOPREFIX
+    DEFPUSHBUTTON   "restart firefox",IDC_RESTARTBUTTON,84,166,68,14
+    PUSHBUTTON      "quit without sending",IDC_CLOSEBUTTON,157,166,77,14
+END
+
+IDD_VIEWREPORTDIALOG DIALOGEX 0, 0, 208, 126
+STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION
+CAPTION "view report"
+FONT 8, "MS Shell Dlg", 400, 0, 0x1
+BEGIN
+    CONTROL         "",IDC_VIEWREPORTTEXT,"RICHEDIT50W",ES_MULTILINE | ES_READONLY | WS_BORDER | WS_VSCROLL | WS_TABSTOP,7,7,194,92
+    DEFPUSHBUTTON   "OK",IDOK,151,105,50,14
+END
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// DESIGNINFO
+//
+
+#ifdef APSTUDIO_INVOKED
+GUIDELINES DESIGNINFO 
+BEGIN
+    IDD_SENDDIALOG, DIALOG
+    BEGIN
+        LEFTMARGIN, 8
+        RIGHTMARGIN, 234
+        TOPMARGIN, 7
+        BOTTOMMARGIN, 180
+    END
+
+    IDD_VIEWREPORTDIALOG, DIALOG
+    BEGIN
+        LEFTMARGIN, 7
+        RIGHTMARGIN, 201
+        TOPMARGIN, 7
+        BOTTOMMARGIN, 119
+    END
+END
+#endif    // APSTUDIO_INVOKED
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+
diff --git a/toolkit/crashreporter/client/crashreporter_gtk_common.cpp b/toolkit/crashreporter/client/crashreporter_gtk_common.cpp
new file mode 100644
index 0000000000..d4bed0209c
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_gtk_common.cpp
@@ -0,0 +1,361 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "crashreporter.h"
+
+#include <unistd.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <gdk/gdkkeysyms.h>
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+#include "common/linux/http_upload.h"
+#include "crashreporter.h"
+#include "crashreporter_gtk_common.h"
+
+#ifndef GDK_KEY_Escape
+#  define GDK_KEY_Escape GDK_Escape
+#endif
+
+using std::string;
+using std::vector;
+
+using namespace CrashReporter;
+
+GtkWidget* gWindow = 0;
+GtkWidget* gSubmitReportCheck = 0;
+GtkWidget* gIncludeURLCheck = 0;
+GtkWidget* gThrobber = 0;
+GtkWidget* gProgressLabel = 0;
+GtkWidget* gCloseButton = 0;
+GtkWidget* gRestartButton = 0;
+
+bool gInitialized = false;
+bool gDidTrySend = false;
+StringTable gFiles;
+Json::Value gQueryParameters;
+string gHttpProxy;
+string gAuth;
+string gCACertificateFile;
+string gSendURL;
+string gURLParameter;
+vector<string> gRestartArgs;
+GThread* gSendThreadID;
+
+// From crashreporter_linux.cpp
+void SendReport();
+void DisableGUIAndSendReport();
+void TryInitGnome();
+void UpdateSubmit();
+
+static bool RestartApplication() {
+  char** argv = reinterpret_cast<char**>(
+      malloc(sizeof(char*) * (gRestartArgs.size() + 1)));
+
+  if (!argv) return false;
+
+  unsigned int i;
+  for (i = 0; i < gRestartArgs.size(); i++) {
+    argv[i] = (char*)gRestartArgs[i].c_str();
+  }
+  argv[i] = 0;
+
+  pid_t pid = fork();
+  if (pid == -1) {
+    free(argv);
+    return false;
+  } else if (pid == 0) {
+    (void)execv(argv[0], argv);
+    _exit(1);
+  }
+
+  free(argv);
+
+  return true;
+}
+
+// Quit the app, used as a timeout callback
+gboolean CloseApp(gpointer data) {
+  if (!gAutoSubmit) {
+    gtk_main_quit();
+  }
+  g_thread_join(gSendThreadID);
+  return FALSE;
+}
+
+static gboolean ReportCompleted(gpointer success) {
+  gtk_widget_hide(gThrobber);
+  string str =
+      success ? gStrings[ST_REPORTSUBMITSUCCESS] : gStrings[ST_SUBMITFAILED];
+  gtk_label_set_text(GTK_LABEL(gProgressLabel), str.c_str());
+  g_timeout_add(5000, CloseApp, 0);
+  return FALSE;
+}
+
+#define HTTP_PROXY_DIR "/system/http_proxy"
+
+void LoadProxyinfo() {
+  class GConfClient;
+  typedef GConfClient* (*_gconf_default_fn)();
+  typedef gboolean (*_gconf_bool_fn)(GConfClient*, const gchar*, GError**);
+  typedef gint (*_gconf_int_fn)(GConfClient*, const gchar*, GError**);
+  typedef gchar* (*_gconf_string_fn)(GConfClient*, const gchar*, GError**);
+
+  if (getenv("http_proxy"))
+    return;  // libcurl can use the value from the environment
+
+  static void* gconfLib = dlopen("libgconf-2.so.4", RTLD_LAZY);
+  if (!gconfLib) return;
+
+  _gconf_default_fn gconf_client_get_default =
+      (_gconf_default_fn)dlsym(gconfLib, "gconf_client_get_default");
+  _gconf_bool_fn gconf_client_get_bool =
+      (_gconf_bool_fn)dlsym(gconfLib, "gconf_client_get_bool");
+  _gconf_int_fn gconf_client_get_int =
+      (_gconf_int_fn)dlsym(gconfLib, "gconf_client_get_int");
+  _gconf_string_fn gconf_client_get_string =
+      (_gconf_string_fn)dlsym(gconfLib, "gconf_client_get_string");
+
+  if (!(gconf_client_get_default && gconf_client_get_bool &&
+        gconf_client_get_int && gconf_client_get_string)) {
+    dlclose(gconfLib);
+    return;
+  }
+
+  GConfClient* conf = gconf_client_get_default();
+
+  if (gconf_client_get_bool(conf, HTTP_PROXY_DIR "/use_http_proxy", nullptr)) {
+    gint port;
+    gchar *host = nullptr, *httpproxy = nullptr;
+
+    host = gconf_client_get_string(conf, HTTP_PROXY_DIR "/host", nullptr);
+    port = gconf_client_get_int(conf, HTTP_PROXY_DIR "/port", nullptr);
+
+    if (port && host && *host != '\0') {
+      httpproxy = g_strdup_printf("http://%s:%d/", host, port);
+      gHttpProxy = httpproxy;
+    }
+
+    g_free(host);
+    g_free(httpproxy);
+
+    if (gconf_client_get_bool(conf, HTTP_PROXY_DIR "/use_authentication",
+                              nullptr)) {
+      gchar *user, *password, *auth = nullptr;
+
+      user = gconf_client_get_string(
+          conf, HTTP_PROXY_DIR "/authentication_user", nullptr);
+      password = gconf_client_get_string(
+          conf, HTTP_PROXY_DIR "/authentication_password", nullptr);
+
+      if (user && password) {
+        auth = g_strdup_printf("%s:%s", user, password);
+        gAuth = auth;
+      }
+
+      g_free(user);
+      g_free(password);
+      g_free(auth);
+    }
+  }
+
+  g_object_unref(conf);
+
+  // Don't dlclose gconfLib as libORBit-2 uses atexit().
+}
+
+gpointer SendThread(gpointer args) {
+  Json::StreamWriterBuilder builder;
+  builder["indentation"] = "";
+  string parameters(writeString(builder, gQueryParameters));
+
+  string response, error;
+  long response_code;
+
+  bool success = google_breakpad::HTTPUpload::SendRequest(
+      gSendURL, parameters, gFiles, gHttpProxy, gAuth, gCACertificateFile,
+      &response, &response_code, &error);
+  if (success) {
+    LogMessage("Crash report submitted successfully");
+  } else {
+    LogMessage("Crash report submission failed: " + error);
+  }
+
+  SendCompleted(success, response);
+
+  if (!gAutoSubmit) {
+    // Apparently glib is threadsafe, and will schedule this
+    // on the main thread, see:
+    // http://library.gnome.org/devel/gtk-faq/stable/x499.html
+    g_idle_add(ReportCompleted, (gpointer)success);
+  }
+
+  return nullptr;
+}
+
+gboolean WindowDeleted(GtkWidget* window, GdkEvent* event, gpointer userData) {
+  SaveSettings();
+  gtk_main_quit();
+  return TRUE;
+}
+
+gboolean check_escape(GtkWidget* window, GdkEventKey* event,
+                      gpointer userData) {
+  if (event->keyval == GDK_KEY_Escape) {
+    gtk_main_quit();
+    return TRUE;
+  }
+  return FALSE;
+}
+
+static void MaybeSubmitReport() {
+  if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gSubmitReportCheck))) {
+    gDidTrySend = true;
+    DisableGUIAndSendReport();
+  } else {
+    gtk_main_quit();
+  }
+}
+
+void CloseClicked(GtkButton* button, gpointer userData) {
+  SaveSettings();
+  MaybeSubmitReport();
+}
+
+void RestartClicked(GtkButton* button, gpointer userData) {
+  SaveSettings();
+  RestartApplication();
+  MaybeSubmitReport();
+}
+
+static void UpdateURL() {
+  if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gIncludeURLCheck))) {
+    gQueryParameters["URL"] = gURLParameter;
+  } else {
+    gQueryParameters.removeMember("URL");
+  }
+}
+
+void SubmitReportChecked(GtkButton* sender, gpointer userData) {
+  UpdateSubmit();
+}
+
+void IncludeURLClicked(GtkButton* sender, gpointer userData) { UpdateURL(); }
+
+/* === Crashreporter UI Functions === */
+
+bool UIInit() {
+  // breakpad probably left us with blocked signals, unblock them here
+  sigset_t signals, old;
+  sigfillset(&signals);
+  sigprocmask(SIG_UNBLOCK, &signals, &old);
+
+  // tell glib we're going to use threads
+  g_thread_init(nullptr);
+
+  if (gtk_init_check(&gArgc, &gArgv)) {
+    gInitialized = true;
+
+    if (gStrings.find("isRTL") != gStrings.end() && gStrings["isRTL"] == "yes")
+      gtk_widget_set_default_direction(GTK_TEXT_DIR_RTL);
+
+    return true;
+  }
+
+  return false;
+}
+
+void UIShowDefaultUI() {
+  GtkWidget* errorDialog = gtk_message_dialog_new(
+      nullptr, GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s",
+      gStrings[ST_CRASHREPORTERDEFAULT].c_str());
+
+  gtk_window_set_title(GTK_WINDOW(errorDialog),
+                       gStrings[ST_CRASHREPORTERTITLE].c_str());
+  gtk_dialog_run(GTK_DIALOG(errorDialog));
+}
+
+void UIError_impl(const string& message) {
+  if (!gInitialized) {
+    // Didn't initialize, this is the best we can do
+    printf("Error: %s\n", message.c_str());
+    return;
+  }
+
+  GtkWidget* errorDialog =
+      gtk_message_dialog_new(nullptr, GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR,
+                             GTK_BUTTONS_CLOSE, "%s", message.c_str());
+
+  gtk_window_set_title(GTK_WINDOW(errorDialog),
+                       gStrings[ST_CRASHREPORTERTITLE].c_str());
+  gtk_dialog_run(GTK_DIALOG(errorDialog));
+}
+
+bool UIGetIniPath(string& path) {
+  path = gArgv[0];
+  path.append(".ini");
+
+  return true;
+}
+
+/*
+ * Settings are stored in ~/.vendor/product, or
+ * ~/.product if vendor is empty.
+ */
+bool UIGetSettingsPath(const string& vendor, const string& product,
+                       string& settingsPath) {
+  char* home = getenv("HOME");
+
+  if (!home) return false;
+
+  settingsPath = home;
+  settingsPath += "/.";
+  if (!vendor.empty()) {
+    string lc_vendor;
+    std::transform(vendor.begin(), vendor.end(), back_inserter(lc_vendor),
+                   (int (*)(int))std::tolower);
+    settingsPath += lc_vendor + "/";
+  }
+  string lc_product;
+  std::transform(product.begin(), product.end(), back_inserter(lc_product),
+                 (int (*)(int))std::tolower);
+  settingsPath += lc_product + "/Crash Reports";
+  return true;
+}
+
+bool UIMoveFile(const string& file, const string& newfile) {
+  if (!rename(file.c_str(), newfile.c_str())) return true;
+  if (errno != EXDEV) return false;
+
+  // use system /bin/mv instead, time to fork
+  pid_t pID = vfork();
+  if (pID < 0) {
+    // Failed to fork
+    return false;
+  }
+  if (pID == 0) {
+    char* const args[4] = {const_cast<char*>("mv"), strdup(file.c_str()),
+                           strdup(newfile.c_str()), 0};
+    if (args[1] && args[2]) execve("/bin/mv", args, 0);
+    free(args[1]);
+    free(args[2]);
+    exit(-1);
+  }
+  int status;
+  waitpid(pID, &status, 0);
+  return UIFileExists(newfile);
+}
diff --git a/toolkit/crashreporter/client/crashreporter_gtk_common.h b/toolkit/crashreporter/client/crashreporter_gtk_common.h
new file mode 100644
index 0000000000..208c7ba6b0
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_gtk_common.h
@@ -0,0 +1,50 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CRASHREPORTER_GTK_COMMON_H__
+#define CRASHREPORTER_GTK_COMMON_H__
+
+#include <glib.h>
+#include <gtk/gtk.h>
+
+#include <string>
+#include <vector>
+
+#include "json/json.h"
+
+const char kIniFile[] = "crashreporter.ini";
+
+extern GtkWidget* gWindow;
+extern GtkWidget* gSubmitReportCheck;
+extern GtkWidget* gIncludeURLCheck;
+extern GtkWidget* gThrobber;
+extern GtkWidget* gProgressLabel;
+extern GtkWidget* gCloseButton;
+extern GtkWidget* gRestartButton;
+
+extern std::vector<std::string> gRestartArgs;
+extern GThread* gSendThreadID;
+
+extern bool gInitialized;
+extern bool gDidTrySend;
+extern StringTable gFiles;
+extern Json::Value gQueryParameters;
+extern std::string gHttpProxy;
+extern std::string gAuth;
+extern std::string gCACertificateFile;
+extern std::string gSendURL;
+extern std::string gURLParameter;
+
+void LoadProxyinfo();
+gboolean CloseApp(gpointer data);
+gpointer SendThread(gpointer args);
+gboolean WindowDeleted(GtkWidget* window, GdkEvent* event, gpointer userData);
+gboolean check_escape(GtkWidget* window, GdkEventKey* event, gpointer data);
+void SubmitReportChecked(GtkButton* sender, gpointer userData);
+void IncludeURLClicked(GtkButton* sender, gpointer userData);
+void CloseClicked(GtkButton* button, gpointer userData);
+void RestartClicked(GtkButton* button, gpointer userData);
+void SaveSettings(void);
+
+#endif  // CRASHREPORTER_GTK_COMMON_H__
diff --git a/toolkit/crashreporter/client/crashreporter_linux.cpp b/toolkit/crashreporter/client/crashreporter_linux.cpp
new file mode 100644
index 0000000000..d11f10a472
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_linux.cpp
@@ -0,0 +1,525 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <string.h>
+
+#include <cctype>
+
+#include "crashreporter.h"
+#include "crashreporter_gtk_common.h"
+
+#define LABEL_MAX_CHAR_WIDTH 48
+
+using std::ios;
+using std::string;
+using std::vector;
+
+using namespace CrashReporter;
+
+static GtkWidget* gViewReportButton = 0;
+static GtkWidget* gCommentTextLabel = 0;
+static GtkWidget* gCommentText = 0;
+
+static bool gCommentFieldHint = true;
+
+// handle from dlopen'ing libgnome
+static void* gnomeLib = nullptr;
+// handle from dlopen'ing libgnomeui
+static void* gnomeuiLib = nullptr;
+
+static void LoadSettings() {
+  /*
+   * NOTE! This code needs to stay in sync with the preference checking
+   *       code in in nsExceptionHandler.cpp.
+   */
+
+  bool includeURL = true;
+  bool submitReport = true;
+  StringTable settings;
+  if (ReadStringsFromFile(gSettingsPath + "/" + kIniFile, settings, true)) {
+    if (settings.find("IncludeURL") != settings.end()) {
+      includeURL = settings["IncludeURL"][0] != '0';
+    }
+    if (settings.find("SubmitReport") != settings.end()) {
+      submitReport = settings["SubmitReport"][0] != '0';
+    }
+  }
+
+  if (gIncludeURLCheck) {
+    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(gIncludeURLCheck),
+                                 includeURL);
+  }
+  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(gSubmitReportCheck),
+                               submitReport);
+}
+
+static string Escape(const string& str) {
+  string ret;
+  for (auto c : str) {
+    if (c == '\\') {
+      ret += "\\\\";
+    } else if (c == '\n') {
+      ret += "\\n";
+    } else if (c == '\t') {
+      ret += "\\t";
+    } else {
+      ret.push_back(c);
+    }
+  }
+
+  return ret;
+}
+
+static bool WriteStrings(std::ostream& out, const string& header,
+                         StringTable& strings, bool escape) {
+  out << "[" << header << "]" << std::endl;
+  for (const auto& iter : strings) {
+    out << iter.first << "=";
+    if (escape) {
+      out << Escape(iter.second);
+    } else {
+      out << iter.second;
+    }
+
+    out << std::endl;
+  }
+
+  return true;
+}
+
+static bool WriteStringsToFile(const string& path, const string& header,
+                               StringTable& strings, bool escape) {
+  std::ofstream* f = UIOpenWrite(path, ios::trunc);
+  bool success = false;
+  if (f->is_open()) {
+    success = WriteStrings(*f, header, strings, escape);
+    f->close();
+  }
+
+  delete f;
+  return success;
+}
+
+void SaveSettings() {
+  /*
+   * NOTE! This code needs to stay in sync with the preference setting
+   *       code in in nsExceptionHandler.cpp.
+   */
+
+  StringTable settings;
+
+  ReadStringsFromFile(gSettingsPath + "/" + kIniFile, settings, true);
+  if (gIncludeURLCheck != 0)
+    settings["IncludeURL"] =
+        gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gIncludeURLCheck)) ? "1"
+                                                                          : "0";
+  settings["SubmitReport"] =
+      gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gSubmitReportCheck)) ? "1"
+                                                                          : "0";
+
+  WriteStringsToFile(gSettingsPath + "/" + kIniFile, "Crash Reporter", settings,
+                     true);
+}
+
+void SendReport() {
+  LoadProxyinfo();
+
+  // spawn a thread to do the sending
+  gSendThreadID = g_thread_create(SendThread, nullptr, TRUE, nullptr);
+}
+
+void DisableGUIAndSendReport() {
+  // disable all our gui controls, show the throbber + change the progress text
+  gtk_widget_set_sensitive(gSubmitReportCheck, FALSE);
+  gtk_widget_set_sensitive(gViewReportButton, FALSE);
+  gtk_widget_set_sensitive(gCommentText, FALSE);
+  if (gIncludeURLCheck) gtk_widget_set_sensitive(gIncludeURLCheck, FALSE);
+  gtk_widget_set_sensitive(gCloseButton, FALSE);
+  if (gRestartButton) gtk_widget_set_sensitive(gRestartButton, FALSE);
+  gtk_widget_show_all(gThrobber);
+  gtk_label_set_text(GTK_LABEL(gProgressLabel),
+                     gStrings[ST_REPORTDURINGSUBMIT].c_str());
+
+  SendReport();
+}
+
+static void ShowReportInfo(GtkTextView* viewReportTextView) {
+  GtkTextBuffer* buffer = gtk_text_view_get_buffer(viewReportTextView);
+
+  GtkTextIter start, end;
+  gtk_text_buffer_get_start_iter(buffer, &start);
+  gtk_text_buffer_get_end_iter(buffer, &end);
+
+  gtk_text_buffer_delete(buffer, &start, &end);
+
+  for (Json::ValueConstIterator iter = gQueryParameters.begin();
+       iter != gQueryParameters.end(); ++iter) {
+    gtk_text_buffer_insert(buffer, &end, iter.name().c_str(),
+                           iter.name().length());
+    gtk_text_buffer_insert(buffer, &end, ": ", -1);
+    string value;
+    if (iter->isString()) {
+      value = iter->asString();
+    } else {
+      Json::StreamWriterBuilder builder;
+      builder["indentation"] = "";
+      value = writeString(builder, *iter);
+    }
+    gtk_text_buffer_insert(buffer, &end, value.c_str(), value.length());
+    gtk_text_buffer_insert(buffer, &end, "\n", -1);
+  }
+
+  gtk_text_buffer_insert(buffer, &end, "\n", -1);
+  gtk_text_buffer_insert(buffer, &end, gStrings[ST_EXTRAREPORTINFO].c_str(),
+                         -1);
+}
+
+void UpdateSubmit() {
+  if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gSubmitReportCheck))) {
+    gtk_widget_set_sensitive(gViewReportButton, TRUE);
+    gtk_widget_set_sensitive(gCommentText, TRUE);
+    if (gIncludeURLCheck) gtk_widget_set_sensitive(gIncludeURLCheck, TRUE);
+    gtk_label_set_text(GTK_LABEL(gProgressLabel),
+                       gStrings[ST_REPORTPRESUBMIT].c_str());
+  } else {
+    gtk_widget_set_sensitive(gViewReportButton, FALSE);
+    gtk_widget_set_sensitive(gCommentText, FALSE);
+    if (gIncludeURLCheck) gtk_widget_set_sensitive(gIncludeURLCheck, FALSE);
+    gtk_label_set_text(GTK_LABEL(gProgressLabel), "");
+  }
+}
+
+static void ViewReportClicked(GtkButton* button, gpointer userData) {
+  GtkDialog* dialog = GTK_DIALOG(gtk_dialog_new_with_buttons(
+      gStrings[ST_VIEWREPORTTITLE].c_str(), GTK_WINDOW(gWindow),
+      GTK_DIALOG_MODAL, GTK_STOCK_OK, GTK_RESPONSE_OK, nullptr));
+
+  GtkWidget* scrolled = gtk_scrolled_window_new(0, 0);
+  gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(dialog)),
+                    scrolled);
+  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
+                                 GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
+  gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled),
+                                      GTK_SHADOW_IN);
+  gtk_widget_set_vexpand(scrolled, TRUE);
+
+  GtkWidget* viewReportTextView = gtk_text_view_new();
+  gtk_container_add(GTK_CONTAINER(scrolled), viewReportTextView);
+  gtk_text_view_set_editable(GTK_TEXT_VIEW(viewReportTextView), FALSE);
+  gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(viewReportTextView), GTK_WRAP_WORD);
+  gtk_widget_set_size_request(GTK_WIDGET(viewReportTextView), -1, 100);
+
+  ShowReportInfo(GTK_TEXT_VIEW(viewReportTextView));
+
+  gtk_dialog_set_default_response(dialog, GTK_RESPONSE_OK);
+  gtk_widget_set_size_request(GTK_WIDGET(dialog), 400, 200);
+  gtk_widget_show_all(GTK_WIDGET(dialog));
+  gtk_dialog_run(dialog);
+  gtk_widget_destroy(GTK_WIDGET(dialog));
+}
+
+static void CommentChanged(GtkTextBuffer* buffer, gpointer userData) {
+  GtkTextIter start, end;
+  gtk_text_buffer_get_start_iter(buffer, &start);
+  gtk_text_buffer_get_end_iter(buffer, &end);
+  const char* comment = gtk_text_buffer_get_text(buffer, &start, &end, TRUE);
+  if (comment[0] == '\0' || gCommentFieldHint) {
+    gQueryParameters.removeMember("Comments");
+  } else {
+    gQueryParameters["Comments"] = comment;
+  }
+}
+
+static void CommentInsert(GtkTextBuffer* buffer, GtkTextIter* location,
+                          gchar* text, gint len, gpointer userData) {
+  GtkTextIter start, end;
+  gtk_text_buffer_get_start_iter(buffer, &start);
+  gtk_text_buffer_get_end_iter(buffer, &end);
+  const char* comment = gtk_text_buffer_get_text(buffer, &start, &end, TRUE);
+
+  // limit to 500 bytes in utf-8
+  if (strlen(comment) + len > MAX_COMMENT_LENGTH) {
+    g_signal_stop_emission_by_name(buffer, "insert-text");
+  }
+}
+
+static void UpdateHintText(GtkWidget* widget, gboolean gainedFocus,
+                           bool* hintShowing, const char* hintText) {
+  GtkTextBuffer* buffer = nullptr;
+  if (GTK_IS_TEXT_VIEW(widget))
+    buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget));
+
+  if (gainedFocus) {
+    if (*hintShowing) {
+      if (buffer == nullptr) {  // sort of cheating
+        gtk_entry_set_text(GTK_ENTRY(widget), "");
+      } else {  // GtkTextView
+        gtk_text_buffer_set_text(buffer, "", 0);
+      }
+      gtk_widget_modify_text(widget, GTK_STATE_NORMAL, nullptr);
+      *hintShowing = false;
+    }
+  } else {
+    // lost focus
+    const char* text = nullptr;
+    if (buffer == nullptr) {
+      text = gtk_entry_get_text(GTK_ENTRY(widget));
+    } else {
+      GtkTextIter start, end;
+      gtk_text_buffer_get_start_iter(buffer, &start);
+      gtk_text_buffer_get_end_iter(buffer, &end);
+      text = gtk_text_buffer_get_text(buffer, &start, &end, TRUE);
+    }
+
+    if (text == nullptr || text[0] == '\0') {
+      *hintShowing = true;
+
+      if (buffer == nullptr) {
+        gtk_entry_set_text(GTK_ENTRY(widget), hintText);
+      } else {
+        gtk_text_buffer_set_text(buffer, hintText, -1);
+      }
+
+      gtk_widget_modify_text(
+          widget, GTK_STATE_NORMAL,
+          &gtk_widget_get_style(widget)->text[GTK_STATE_INSENSITIVE]);
+    }
+  }
+}
+
+static gboolean CommentFocusChange(GtkWidget* widget, GdkEventFocus* event,
+                                   gpointer userData) {
+  UpdateHintText(widget, event->in, &gCommentFieldHint,
+                 gStrings[ST_COMMENTGRAYTEXT].c_str());
+
+  return FALSE;
+}
+
+typedef struct _GnomeProgram GnomeProgram;
+typedef struct _GnomeModuleInfo GnomeModuleInfo;
+typedef GnomeProgram* (*_gnome_program_init_fn)(const char*, const char*,
+                                                const GnomeModuleInfo*, int,
+                                                char**, const char*, ...);
+typedef const GnomeModuleInfo* (*_libgnomeui_module_info_get_fn)();
+
+void TryInitGnome() {
+  gnomeLib = dlopen("libgnome-2.so.0", RTLD_LAZY);
+  if (!gnomeLib) return;
+
+  gnomeuiLib = dlopen("libgnomeui-2.so.0", RTLD_LAZY);
+  if (!gnomeuiLib) return;
+
+  _gnome_program_init_fn gnome_program_init =
+      (_gnome_program_init_fn)(dlsym(gnomeLib, "gnome_program_init"));
+  _libgnomeui_module_info_get_fn libgnomeui_module_info_get =
+      (_libgnomeui_module_info_get_fn)(dlsym(gnomeuiLib,
+                                             "libgnomeui_module_info_get"));
+
+  if (gnome_program_init && libgnomeui_module_info_get) {
+    gnome_program_init("crashreporter", "1.0", libgnomeui_module_info_get(),
+                       gArgc, gArgv, nullptr);
+  }
+}
+
+/* === Crashreporter UI Functions === */
+
+/*
+ * Anything not listed here is in crashreporter_gtk_common.cpp:
+ *  UIInit
+ *  UIShowDefaultUI
+ *  UIError_impl
+ *  UIGetIniPath
+ *  UIGetSettingsPath
+ *  UIEnsurePathExists
+ *  UIFileExists
+ *  UIMoveFile
+ *  UIDeleteFile
+ *  UIOpenRead
+ *  UIOpenWrite
+ */
+
+void UIShutdown() {
+  if (gnomeuiLib) dlclose(gnomeuiLib);
+  // Don't dlclose gnomeLib as libgnomevfs and libORBit-2 use atexit().
+}
+
+bool UIShowCrashUI(const StringTable& files, const Json::Value& queryParameters,
+                   const string& sendURL, const vector<string>& restartArgs) {
+  gFiles = files;
+  gQueryParameters = queryParameters;
+  gSendURL = sendURL;
+  gRestartArgs = restartArgs;
+  if (gQueryParameters.isMember("URL")) {
+    gURLParameter = gQueryParameters["URL"].asString();
+  }
+
+  if (gAutoSubmit) {
+    SendReport();
+    CloseApp(nullptr);
+    return true;
+  }
+
+  gWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_title(GTK_WINDOW(gWindow),
+                       gStrings[ST_CRASHREPORTERTITLE].c_str());
+  gtk_window_set_resizable(GTK_WINDOW(gWindow), FALSE);
+  gtk_window_set_position(GTK_WINDOW(gWindow), GTK_WIN_POS_CENTER);
+  gtk_container_set_border_width(GTK_CONTAINER(gWindow), 12);
+  g_signal_connect(gWindow, "delete-event", G_CALLBACK(WindowDeleted), 0);
+  g_signal_connect(gWindow, "key_press_event", G_CALLBACK(check_escape),
+                   nullptr);
+
+  GtkWidget* vbox = gtk_vbox_new(FALSE, 6);
+  gtk_container_add(GTK_CONTAINER(gWindow), vbox);
+
+  GtkWidget* titleLabel = gtk_label_new("");
+  gtk_box_pack_start(GTK_BOX(vbox), titleLabel, FALSE, FALSE, 0);
+  gtk_misc_set_alignment(GTK_MISC(titleLabel), 0, 0.5);
+  char* markup =
+      g_strdup_printf("<b>%s</b>", gStrings[ST_CRASHREPORTERHEADER].c_str());
+  gtk_label_set_markup(GTK_LABEL(titleLabel), markup);
+  g_free(markup);
+
+  GtkWidget* descriptionLabel =
+      gtk_label_new(gStrings[ST_CRASHREPORTERDESCRIPTION].c_str());
+  gtk_box_pack_start(GTK_BOX(vbox), descriptionLabel, TRUE, TRUE, 0);
+  // force the label to line wrap
+  gtk_label_set_max_width_chars(GTK_LABEL(descriptionLabel),
+                                LABEL_MAX_CHAR_WIDTH);
+  gtk_label_set_line_wrap(GTK_LABEL(descriptionLabel), TRUE);
+  gtk_label_set_selectable(GTK_LABEL(descriptionLabel), TRUE);
+  gtk_misc_set_alignment(GTK_MISC(descriptionLabel), 0, 0.5);
+
+  // this is honestly how they suggest you indent a section
+  GtkWidget* indentBox = gtk_hbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(vbox), indentBox, FALSE, FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(indentBox), gtk_label_new(""), FALSE, FALSE, 6);
+
+  GtkWidget* innerVBox1 = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(indentBox), innerVBox1, TRUE, TRUE, 0);
+
+  gSubmitReportCheck =
+      gtk_check_button_new_with_label(gStrings[ST_CHECKSUBMIT].c_str());
+  gtk_box_pack_start(GTK_BOX(innerVBox1), gSubmitReportCheck, FALSE, FALSE, 0);
+  g_signal_connect(gSubmitReportCheck, "clicked",
+                   G_CALLBACK(SubmitReportChecked), 0);
+
+  // indent again, below the "submit report" checkbox
+  GtkWidget* indentBox2 = gtk_hbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(innerVBox1), indentBox2, FALSE, FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(indentBox2), gtk_label_new(""), FALSE, FALSE, 6);
+
+  GtkWidget* innerVBox = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_start(GTK_BOX(indentBox2), innerVBox, TRUE, TRUE, 0);
+  gtk_box_set_spacing(GTK_BOX(innerVBox), 6);
+
+  GtkWidget* viewReportButtonBox = gtk_hbutton_box_new();
+  gtk_box_pack_start(GTK_BOX(innerVBox), viewReportButtonBox, FALSE, FALSE, 0);
+  gtk_box_set_spacing(GTK_BOX(viewReportButtonBox), 6);
+  gtk_button_box_set_layout(GTK_BUTTON_BOX(viewReportButtonBox),
+                            GTK_BUTTONBOX_START);
+
+  gViewReportButton =
+      gtk_button_new_with_label(gStrings[ST_VIEWREPORT].c_str());
+  gtk_box_pack_start(GTK_BOX(viewReportButtonBox), gViewReportButton, FALSE,
+                     FALSE, 0);
+  g_signal_connect(gViewReportButton, "clicked", G_CALLBACK(ViewReportClicked),
+                   0);
+
+  GtkWidget* scrolled = gtk_scrolled_window_new(0, 0);
+  gtk_container_add(GTK_CONTAINER(innerVBox), scrolled);
+  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
+                                 GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
+  gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled),
+                                      GTK_SHADOW_IN);
+  gtk_scrolled_window_set_min_content_height(GTK_SCROLLED_WINDOW(scrolled),
+                                             100);
+
+  gCommentTextLabel = gtk_label_new(gStrings[ST_COMMENTGRAYTEXT].c_str());
+  gCommentText = gtk_text_view_new();
+  gtk_label_set_mnemonic_widget(GTK_LABEL(gCommentTextLabel), gCommentText);
+  gtk_text_view_set_accepts_tab(GTK_TEXT_VIEW(gCommentText), FALSE);
+  g_signal_connect(gCommentText, "focus-in-event",
+                   G_CALLBACK(CommentFocusChange), 0);
+  g_signal_connect(gCommentText, "focus-out-event",
+                   G_CALLBACK(CommentFocusChange), 0);
+
+  GtkTextBuffer* commentBuffer =
+      gtk_text_view_get_buffer(GTK_TEXT_VIEW(gCommentText));
+  g_signal_connect(commentBuffer, "changed", G_CALLBACK(CommentChanged), 0);
+  g_signal_connect(commentBuffer, "insert-text", G_CALLBACK(CommentInsert), 0);
+
+  gtk_container_add(GTK_CONTAINER(scrolled), gCommentText);
+  gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(gCommentText), GTK_WRAP_WORD_CHAR);
+  gtk_widget_set_size_request(GTK_WIDGET(gCommentText), -1, 100);
+
+  if (gQueryParameters.isMember("URL")) {
+    gIncludeURLCheck =
+        gtk_check_button_new_with_label(gStrings[ST_CHECKURL].c_str());
+    gtk_box_pack_start(GTK_BOX(innerVBox), gIncludeURLCheck, FALSE, FALSE, 0);
+    g_signal_connect(gIncludeURLCheck, "clicked", G_CALLBACK(IncludeURLClicked),
+                     0);
+    // on by default
+    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(gIncludeURLCheck), TRUE);
+  }
+
+  GtkWidget* progressBox = gtk_hbox_new(FALSE, 6);
+  gtk_box_pack_start(GTK_BOX(vbox), progressBox, TRUE, TRUE, 0);
+
+  // Get the throbber image from alongside the executable
+  char* dir = g_path_get_dirname(gArgv[0]);
+  char* path = g_build_filename(dir, "Throbber-small.gif", nullptr);
+  g_free(dir);
+  gThrobber = gtk_image_new_from_file(path);
+  gtk_box_pack_start(GTK_BOX(progressBox), gThrobber, FALSE, FALSE, 0);
+
+  gProgressLabel = gtk_label_new(gStrings[ST_REPORTPRESUBMIT].c_str());
+  gtk_box_pack_start(GTK_BOX(progressBox), gProgressLabel, TRUE, TRUE, 0);
+  // force the label to line wrap
+  gtk_label_set_max_width_chars(GTK_LABEL(gProgressLabel),
+                                LABEL_MAX_CHAR_WIDTH);
+  gtk_label_set_line_wrap(GTK_LABEL(gProgressLabel), TRUE);
+
+  GtkWidget* buttonBox = gtk_hbutton_box_new();
+  gtk_box_pack_end(GTK_BOX(vbox), buttonBox, FALSE, FALSE, 0);
+  gtk_box_set_spacing(GTK_BOX(buttonBox), 6);
+  gtk_button_box_set_layout(GTK_BUTTON_BOX(buttonBox), GTK_BUTTONBOX_END);
+
+  gCloseButton = gtk_button_new_with_label(gStrings[ST_QUIT].c_str());
+  gtk_box_pack_start(GTK_BOX(buttonBox), gCloseButton, FALSE, FALSE, 0);
+  gtk_widget_set_can_default(gCloseButton, TRUE);
+  g_signal_connect(gCloseButton, "clicked", G_CALLBACK(CloseClicked), 0);
+
+  gRestartButton = 0;
+  if (!restartArgs.empty()) {
+    gRestartButton = gtk_button_new_with_label(gStrings[ST_RESTART].c_str());
+    gtk_box_pack_start(GTK_BOX(buttonBox), gRestartButton, FALSE, FALSE, 0);
+    gtk_widget_set_can_default(gRestartButton, TRUE);
+    g_signal_connect(gRestartButton, "clicked", G_CALLBACK(RestartClicked), 0);
+  }
+
+  gtk_widget_grab_focus(gSubmitReportCheck);
+
+  gtk_widget_grab_default(gRestartButton ? gRestartButton : gCloseButton);
+
+  LoadSettings();
+
+  UpdateSubmit();
+
+  UpdateHintText(gCommentText, FALSE, &gCommentFieldHint,
+                 gStrings[ST_COMMENTGRAYTEXT].c_str());
+
+  gtk_widget_show_all(gWindow);
+  // stick this here to avoid the show_all above...
+  gtk_widget_hide(gThrobber);
+
+  gtk_main();
+
+  return gDidTrySend;
+}
diff --git a/toolkit/crashreporter/client/crashreporter_osx.h b/toolkit/crashreporter/client/crashreporter_osx.h
new file mode 100644
index 0000000000..19282a3fe6
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_osx.h
@@ -0,0 +1,107 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CRASHREPORTER_OSX_H__
+#define CRASHREPORTER_OSX_H__
+
+#include <Cocoa/Cocoa.h>
+#include "HTTPMultipartUpload.h"
+#include "crashreporter.h"
+#include "json/json.h"
+
+// Defined below
+@class TextViewWithPlaceHolder;
+
+@interface CrashReporterUI : NSObject {
+  IBOutlet NSWindow* mWindow;
+
+  /* Crash reporter view */
+  IBOutlet NSTextField* mHeaderLabel;
+  IBOutlet NSTextField* mDescriptionLabel;
+  IBOutlet NSButton* mViewReportButton;
+  IBOutlet NSScrollView* mCommentScrollView;
+  IBOutlet TextViewWithPlaceHolder* mCommentText;
+  IBOutlet NSButton* mSubmitReportButton;
+  IBOutlet NSButton* mIncludeURLButton;
+  IBOutlet NSButton* mEmailMeButton;
+  IBOutlet NSTextField* mEmailText;
+  IBOutlet NSButton* mCloseButton;
+  IBOutlet NSButton* mRestartButton;
+  IBOutlet NSProgressIndicator* mProgressIndicator;
+  IBOutlet NSTextField* mProgressText;
+
+  /* Error view */
+  IBOutlet NSView* mErrorView;
+  IBOutlet NSTextField* mErrorHeaderLabel;
+  IBOutlet NSTextField* mErrorLabel;
+  IBOutlet NSButton* mErrorCloseButton;
+
+  /* For "show info" alert */
+  IBOutlet NSWindow* mViewReportWindow;
+  IBOutlet NSTextView* mViewReportTextView;
+  IBOutlet NSButton* mViewReportOkButton;
+
+  HTTPMultipartUpload* mPost;
+}
+
+- (void)showCrashUI:(const StringTable&)files
+    queryParameters:(const Json::Value&)queryParameters
+            sendURL:(const std::string&)sendURL;
+- (void)showErrorUI:(const std::string&)message;
+- (void)showReportInfo;
+- (void)maybeSubmitReport;
+- (void)closeMeDown:(id)unused;
+
+- (IBAction)submitReportClicked:(id)sender;
+- (IBAction)viewReportClicked:(id)sender;
+- (IBAction)viewReportOkClicked:(id)sender;
+- (IBAction)closeClicked:(id)sender;
+- (IBAction)restartClicked:(id)sender;
+- (IBAction)includeURLClicked:(id)sender;
+
+- (void)textDidChange:(NSNotification*)aNotification;
+- (BOOL)textView:(NSTextView*)aTextView
+    shouldChangeTextInRange:(NSRange)affectedCharRange
+          replacementString:(NSString*)replacementString;
+
+- (void)doInitialResizing;
+- (float)setStringFitVertically:(NSControl*)control
+                         string:(NSString*)str
+                   resizeWindow:(BOOL)resizeWindow;
+- (void)setView:(NSView*)v animate:(BOOL)animate;
+- (void)enableControls:(BOOL)enabled;
+- (void)updateSubmit;
+- (void)updateURL;
+- (void)updateEmail;
+- (void)sendReport;
+- (bool)setupPost;
+- (void)uploadThread:(HTTPMultipartUpload*)post;
+- (void)uploadComplete:(NSData*)data;
+
+- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication*)theApplication;
+- (void)applicationWillTerminate:(NSNotification*)aNotification;
+
+@end
+
+/*
+ * Subclass NSTextView to provide a text view with placeholder text.
+ * Also provide a setEnabled implementation.
+ */
+@interface TextViewWithPlaceHolder : NSTextView {
+  NSMutableAttributedString* mPlaceHolderString;
+}
+
+- (BOOL)becomeFirstResponder;
+- (void)drawRect:(NSRect)rect;
+- (BOOL)resignFirstResponder;
+- (void)setPlaceholder:(NSString*)placeholder;
+- (void)insertTab:(id)sender;
+- (void)insertBacktab:(id)sender;
+- (void)setEnabled:(BOOL)enabled;
+- (void)dealloc;
+
+@end
+
+#endif
diff --git a/toolkit/crashreporter/client/crashreporter_osx.mm b/toolkit/crashreporter/client/crashreporter_osx.mm
new file mode 100644
index 0000000000..38b3349a04
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_osx.mm
@@ -0,0 +1,762 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#import <Cocoa/Cocoa.h>
+#import <CoreFoundation/CoreFoundation.h>
+#include "crashreporter.h"
+#include "crashreporter_osx.h"
+#include <crt_externs.h>
+#include <spawn.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sstream>
+
+using std::ostringstream;
+using std::string;
+using std::vector;
+
+using namespace CrashReporter;
+
+static NSAutoreleasePool* gMainPool;
+static CrashReporterUI* gUI = 0;
+static StringTable gFiles;
+static Json::Value gQueryParameters;
+static string gURLParameter;
+static string gSendURL;
+static vector<string> gRestartArgs;
+static bool gDidTrySend = false;
+static bool gRTLlayout = false;
+
+static cpu_type_t pref_cpu_types[2] = {
+#if defined(__i386__)
+    CPU_TYPE_X86,
+#elif defined(__x86_64__)
+    CPU_TYPE_X86_64,
+#elif defined(__ppc__)
+    CPU_TYPE_POWERPC,
+#elif defined(__aarch64__)
+    CPU_TYPE_ARM64,
+#endif
+    CPU_TYPE_ANY};
+
+#define NSSTR(s) [NSString stringWithUTF8String:(s).c_str()]
+
+static NSString* Str(const char* aName) {
+  string str = gStrings[aName];
+  if (str.empty()) str = "?";
+  return NSSTR(str);
+}
+
+static bool RestartApplication() {
+  vector<char*> argv(gRestartArgs.size() + 1);
+
+  posix_spawnattr_t spawnattr;
+  if (posix_spawnattr_init(&spawnattr) != 0) {
+    return false;
+  }
+
+  // Set spawn attributes.
+  size_t attr_count = sizeof(pref_cpu_types) / sizeof(pref_cpu_types[0]);
+  size_t attr_ocount = 0;
+  if (posix_spawnattr_setbinpref_np(&spawnattr, attr_count, pref_cpu_types, &attr_ocount) != 0 ||
+      attr_ocount != attr_count) {
+    posix_spawnattr_destroy(&spawnattr);
+    return false;
+  }
+
+  unsigned int i;
+  for (i = 0; i < gRestartArgs.size(); i++) {
+    argv[i] = (char*)gRestartArgs[i].c_str();
+  }
+  argv[i] = 0;
+
+  char** env = NULL;
+  char*** nsEnv = _NSGetEnviron();
+  if (nsEnv) env = *nsEnv;
+  int result = posix_spawnp(NULL, argv[0], NULL, &spawnattr, &argv[0], env);
+
+  posix_spawnattr_destroy(&spawnattr);
+
+  return result == 0;
+}
+
+@implementation CrashReporterUI
+
+- (void)awakeFromNib {
+  gUI = self;
+  [mWindow center];
+
+  [mWindow setTitle:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleName"]];
+  [NSApp activateIgnoringOtherApps:YES];
+}
+
+- (void)showCrashUI:(const StringTable&)files
+    queryParameters:(const Json::Value&)queryParameters
+            sendURL:(const string&)sendURL {
+  gFiles = files;
+  gQueryParameters = queryParameters;
+  gSendURL = sendURL;
+
+  if (gAutoSubmit) {
+    gDidTrySend = true;
+    [self sendReport];
+    return;
+  }
+
+  [mWindow setTitle:Str(ST_CRASHREPORTERTITLE)];
+  [mHeaderLabel setStringValue:Str(ST_CRASHREPORTERHEADER)];
+
+  NSRect viewReportFrame = [mViewReportButton frame];
+  [mViewReportButton setTitle:Str(ST_VIEWREPORT)];
+  [mViewReportButton sizeToFit];
+  if (gRTLlayout) {
+    // sizeToFit will keep the left side fixed, so realign
+    float oldWidth = viewReportFrame.size.width;
+    viewReportFrame = [mViewReportButton frame];
+    viewReportFrame.origin.x += oldWidth - viewReportFrame.size.width;
+    [mViewReportButton setFrame:viewReportFrame];
+  }
+
+  [mSubmitReportButton setTitle:Str(ST_CHECKSUBMIT)];
+  [mIncludeURLButton setTitle:Str(ST_CHECKURL)];
+  [mViewReportOkButton setTitle:Str(ST_OK)];
+
+  [mCommentText setPlaceholder:Str(ST_COMMENTGRAYTEXT)];
+  if (gRTLlayout) [mCommentText toggleBaseWritingDirection:self];
+
+  if (gQueryParameters.isMember("URL")) {
+    // save the URL value in case the checkbox gets unchecked
+    gURLParameter = gQueryParameters["URL"].asString();
+  } else {
+    // no URL specified, hide checkbox
+    [mIncludeURLButton removeFromSuperview];
+    // shrink window to fit
+    NSRect frame = [mWindow frame];
+    NSRect includeURLFrame = [mIncludeURLButton frame];
+    NSRect emailFrame = [mEmailMeButton frame];
+    int buttonMask = [mViewReportButton autoresizingMask];
+    int checkMask = [mSubmitReportButton autoresizingMask];
+    int commentScrollMask = [mCommentScrollView autoresizingMask];
+
+    [mViewReportButton setAutoresizingMask:NSViewMinYMargin];
+    [mSubmitReportButton setAutoresizingMask:NSViewMinYMargin];
+    [mCommentScrollView setAutoresizingMask:NSViewMinYMargin];
+
+    // remove all the space in between
+    frame.size.height -= includeURLFrame.origin.y - emailFrame.origin.y;
+    [mWindow setFrame:frame display:true animate:NO];
+
+    [mViewReportButton setAutoresizingMask:buttonMask];
+    [mSubmitReportButton setAutoresizingMask:checkMask];
+    [mCommentScrollView setAutoresizingMask:commentScrollMask];
+  }
+
+  // resize some buttons horizontally and possibly some controls vertically
+  [self doInitialResizing];
+
+  // load default state of submit checkbox
+  // we don't just do this via IB because we want the default to be
+  // off a certain percentage of the time
+  BOOL submitChecked = YES;
+  NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];
+  if (nil != [userDefaults objectForKey:@"submitReport"]) {
+    submitChecked = [userDefaults boolForKey:@"submitReport"];
+  } else {
+    [userDefaults setBool:submitChecked forKey:@"submitReport"];
+  }
+  [mSubmitReportButton setState:(submitChecked ? NSOnState : NSOffState)];
+
+  // load default state of include URL checkbox
+  BOOL includeChecked = YES;
+  if (nil != [userDefaults objectForKey:@"IncludeURL"]) {
+    includeChecked = [userDefaults boolForKey:@"IncludeURL"];
+  } else {
+    [userDefaults setBool:includeChecked forKey:@"IncludeURL"];
+  }
+  [mIncludeURLButton setState:(includeChecked ? NSOnState : NSOffState)];
+
+  [self updateSubmit];
+  [self updateURL];
+  [self updateEmail];
+
+  [mWindow makeKeyAndOrderFront:nil];
+}
+
+- (void)showErrorUI:(const string&)message {
+  [self setView:mErrorView animate:NO];
+
+  [mErrorHeaderLabel setStringValue:Str(ST_CRASHREPORTERHEADER)];
+  [self setStringFitVertically:mErrorLabel string:NSSTR(message) resizeWindow:YES];
+  [mErrorCloseButton setTitle:Str(ST_OK)];
+
+  [mErrorCloseButton setKeyEquivalent:@"\r"];
+  [mWindow makeFirstResponder:mErrorCloseButton];
+  [mWindow makeKeyAndOrderFront:nil];
+}
+
+- (void)showReportInfo {
+  NSDictionary* boldAttr = @{
+    NSFontAttributeName : [NSFont boldSystemFontOfSize:[NSFont smallSystemFontSize]],
+    NSForegroundColorAttributeName : NSColor.textColor,
+  };
+  NSDictionary* normalAttr = @{
+    NSFontAttributeName : [NSFont systemFontOfSize:[NSFont smallSystemFontSize]],
+    NSForegroundColorAttributeName : NSColor.textColor,
+  };
+
+  [mViewReportTextView setString:@""];
+  for (Json::ValueConstIterator iter = gQueryParameters.begin(); iter != gQueryParameters.end();
+       ++iter) {
+    NSAttributedString* key = [[NSAttributedString alloc] initWithString:NSSTR(iter.name() + ": ")
+                                                              attributes:boldAttr];
+    string str;
+    if (iter->isString()) {
+      str = iter->asString();
+    } else {
+      Json::StreamWriterBuilder builder;
+      builder["indentation"] = "";
+      str = writeString(builder, *iter);
+    }
+    NSAttributedString* value = [[NSAttributedString alloc] initWithString:NSSTR(str + "\n")
+                                                                attributes:normalAttr];
+    [[mViewReportTextView textStorage] appendAttributedString:key];
+    [[mViewReportTextView textStorage] appendAttributedString:value];
+    [key release];
+    [value release];
+  }
+
+  NSAttributedString* extra =
+      [[NSAttributedString alloc] initWithString:NSSTR("\n" + gStrings[ST_EXTRAREPORTINFO])
+                                      attributes:normalAttr];
+  [[mViewReportTextView textStorage] appendAttributedString:extra];
+  [extra release];
+}
+
+- (void)maybeSubmitReport {
+  if ([mSubmitReportButton state] == NSOnState) {
+    [self setStringFitVertically:mProgressText string:Str(ST_REPORTDURINGSUBMIT) resizeWindow:YES];
+    // disable all the controls
+    [self enableControls:NO];
+    [mSubmitReportButton setEnabled:NO];
+    [mRestartButton setEnabled:NO];
+    [mCloseButton setEnabled:NO];
+    [mProgressIndicator startAnimation:self];
+    gDidTrySend = true;
+    [self sendReport];
+  } else {
+    [NSApp terminate:self];
+  }
+}
+
+- (void)closeMeDown:(id)unused {
+  [NSApp terminate:self];
+}
+
+- (IBAction)submitReportClicked:(id)sender {
+  [self updateSubmit];
+  NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];
+  [userDefaults setBool:([mSubmitReportButton state] == NSOnState) forKey:@"submitReport"];
+  [userDefaults synchronize];
+}
+
+- (IBAction)viewReportClicked:(id)sender {
+  [self showReportInfo];
+  [NSApp beginSheet:mViewReportWindow
+      modalForWindow:mWindow
+       modalDelegate:nil
+      didEndSelector:nil
+         contextInfo:nil];
+}
+
+- (IBAction)viewReportOkClicked:(id)sender {
+  [mViewReportWindow orderOut:nil];
+  [NSApp endSheet:mViewReportWindow];
+}
+
+- (IBAction)closeClicked:(id)sender {
+  [self maybeSubmitReport];
+}
+
+- (IBAction)restartClicked:(id)sender {
+  RestartApplication();
+  [self maybeSubmitReport];
+}
+
+- (IBAction)includeURLClicked:(id)sender {
+  [self updateURL];
+  NSUserDefaults* userDefaults = [NSUserDefaults standardUserDefaults];
+  [userDefaults setBool:([mIncludeURLButton state] == NSOnState) forKey:@"IncludeURL"];
+  [userDefaults synchronize];
+}
+
+- (void)textDidChange:(NSNotification*)aNotification {
+  // update comment parameter
+  if ([[[mCommentText textStorage] mutableString] length] > 0)
+    gQueryParameters["Comments"] = [[[mCommentText textStorage] mutableString] UTF8String];
+  else
+    gQueryParameters.removeMember("Comments");
+}
+
+// Limit the comment field to 500 bytes in UTF-8
+- (BOOL)textView:(NSTextView*)aTextView
+    shouldChangeTextInRange:(NSRange)affectedCharRange
+          replacementString:(NSString*)replacementString {
+  // current string length + replacement text length - replaced range length
+  if (([[aTextView string] lengthOfBytesUsingEncoding:NSUTF8StringEncoding] +
+       [replacementString lengthOfBytesUsingEncoding:NSUTF8StringEncoding] -
+       [[[aTextView string] substringWithRange:affectedCharRange]
+           lengthOfBytesUsingEncoding:NSUTF8StringEncoding]) > MAX_COMMENT_LENGTH) {
+    return NO;
+  }
+  return YES;
+}
+
+- (void)doInitialResizing {
+  NSRect windowFrame = [mWindow frame];
+  NSRect restartFrame = [mRestartButton frame];
+  NSRect closeFrame = [mCloseButton frame];
+  // resize close button to fit text
+  float oldCloseWidth = closeFrame.size.width;
+  [mCloseButton setTitle:Str(ST_QUIT)];
+  [mCloseButton sizeToFit];
+  closeFrame = [mCloseButton frame];
+  // move close button left if it grew
+  if (!gRTLlayout) {
+    closeFrame.origin.x -= closeFrame.size.width - oldCloseWidth;
+  }
+
+  if (gRestartArgs.size() == 0) {
+    [mRestartButton removeFromSuperview];
+    if (!gRTLlayout) {
+      closeFrame.origin.x =
+          restartFrame.origin.x + (restartFrame.size.width - closeFrame.size.width);
+    } else {
+      closeFrame.origin.x = restartFrame.origin.x;
+    }
+    [mCloseButton setFrame:closeFrame];
+    [mCloseButton setKeyEquivalent:@"\r"];
+  } else {
+    [mRestartButton setTitle:Str(ST_RESTART)];
+    // resize "restart" button
+    float oldRestartWidth = restartFrame.size.width;
+    [mRestartButton sizeToFit];
+    restartFrame = [mRestartButton frame];
+    if (!gRTLlayout) {
+      // move left by the amount that the button grew
+      restartFrame.origin.x -= restartFrame.size.width - oldRestartWidth;
+      closeFrame.origin.x -= restartFrame.size.width - oldRestartWidth;
+    } else {
+      // shift the close button right in RTL
+      closeFrame.origin.x += restartFrame.size.width - oldRestartWidth;
+    }
+    [mRestartButton setFrame:restartFrame];
+    [mCloseButton setFrame:closeFrame];
+    // possibly resize window if both buttons no longer fit
+    // leave 20 px from either side of the window, and 12 px
+    // between the buttons
+    float neededWidth = closeFrame.size.width + restartFrame.size.width + 2 * 20 + 12;
+
+    if (neededWidth > windowFrame.size.width) {
+      windowFrame.size.width = neededWidth;
+      [mWindow setFrame:windowFrame display:true animate:NO];
+    }
+    [mRestartButton setKeyEquivalent:@"\r"];
+  }
+
+  NSButton* checkboxes[] = {mSubmitReportButton, mIncludeURLButton};
+
+  for (auto checkbox : checkboxes) {
+    NSRect frame = [checkbox frame];
+    [checkbox sizeToFit];
+    if (gRTLlayout) {
+      // sizeToFit will keep the left side fixed, so realign
+      float oldWidth = frame.size.width;
+      frame = [checkbox frame];
+      frame.origin.x += oldWidth - frame.size.width;
+      [checkbox setFrame:frame];
+    }
+    // keep existing spacing on left side, + 20 px spare on right
+    float neededWidth = frame.origin.x + checkbox.intrinsicContentSize.width + 20;
+    if (neededWidth > windowFrame.size.width) {
+      windowFrame.size.width = neededWidth;
+      [mWindow setFrame:windowFrame display:true animate:NO];
+    }
+  }
+
+  // do this down here because we may have made the window wider
+  // up above
+  [self setStringFitVertically:mDescriptionLabel
+                        string:Str(ST_CRASHREPORTERDESCRIPTION)
+                  resizeWindow:YES];
+
+  // now pin all the controls (except quit/submit) in place,
+  // if we lengthen the window after this, it's just to lengthen
+  // the progress text, so nothing above that text should move.
+  NSView* views[] = {mSubmitReportButton, mViewReportButton,  mCommentScrollView,
+                     mIncludeURLButton,   mProgressIndicator, mProgressText};
+  for (auto view : views) {
+    [view setAutoresizingMask:NSViewMinYMargin];
+  }
+}
+
+- (float)setStringFitVertically:(NSControl*)control
+                         string:(NSString*)str
+                   resizeWindow:(BOOL)resizeWindow {
+  // hack to make the text field grow vertically
+  NSRect frame = [control frame];
+  float oldHeight = frame.size.height;
+
+  frame.size.height = 10000;
+  NSSize oldCellSize = [[control cell] cellSizeForBounds:frame];
+  [control setStringValue:str];
+  NSSize newCellSize = [[control cell] cellSizeForBounds:frame];
+
+  float delta = newCellSize.height - oldCellSize.height;
+  frame.origin.y -= delta;
+  frame.size.height = oldHeight + delta;
+  [control setFrame:frame];
+
+  if (resizeWindow) {
+    NSRect frame = [mWindow frame];
+    frame.origin.y -= delta;
+    frame.size.height += delta;
+    [mWindow setFrame:frame display:true animate:NO];
+  }
+
+  return delta;
+}
+
+- (void)setView:(NSView*)v animate:(BOOL)animate {
+  NSRect frame = [mWindow frame];
+
+  NSRect oldViewFrame = [[mWindow contentView] frame];
+  NSRect newViewFrame = [v frame];
+
+  frame.origin.y += oldViewFrame.size.height - newViewFrame.size.height;
+  frame.size.height -= oldViewFrame.size.height - newViewFrame.size.height;
+
+  frame.origin.x += oldViewFrame.size.width - newViewFrame.size.width;
+  frame.size.width -= oldViewFrame.size.width - newViewFrame.size.width;
+
+  [mWindow setContentView:v];
+  [mWindow setFrame:frame display:true animate:animate];
+}
+
+- (void)enableControls:(BOOL)enabled {
+  [mViewReportButton setEnabled:enabled];
+  [mIncludeURLButton setEnabled:enabled];
+  [mCommentText setEnabled:enabled];
+  [mCommentScrollView setHasVerticalScroller:enabled];
+}
+
+- (void)updateSubmit {
+  if ([mSubmitReportButton state] == NSOnState) {
+    [self setStringFitVertically:mProgressText string:Str(ST_REPORTPRESUBMIT) resizeWindow:YES];
+    [mProgressText setHidden:NO];
+    // enable all the controls
+    [self enableControls:YES];
+  } else {
+    // not submitting, disable all the controls under
+    // the submit checkbox, and hide the status text
+    [mProgressText setHidden:YES];
+    [self enableControls:NO];
+  }
+}
+
+- (void)updateURL {
+  if ([mIncludeURLButton state] == NSOnState && !gURLParameter.empty()) {
+    gQueryParameters["URL"] = gURLParameter;
+  } else {
+    gQueryParameters.removeMember("URL");
+  }
+}
+
+- (void)updateEmail {
+  // In order to remove the email fields, we have to edit the .nib files which
+  // we can't do with current xcode so we make them hidden; updating the
+  // crashreporter interface for mac is covered in bug #1696164
+  [mEmailMeButton setHidden:YES];
+  [mEmailText setHidden:YES];
+}
+
+- (void)sendReport {
+  if (![self setupPost]) {
+    LogMessage("Crash report submission failed: could not set up POST data");
+
+    if (gAutoSubmit) {
+      [NSApp terminate:self];
+    }
+
+    [self setStringFitVertically:mProgressText string:Str(ST_SUBMITFAILED) resizeWindow:YES];
+    // quit after 5 seconds
+    [self performSelector:@selector(closeMeDown:) withObject:nil afterDelay:5.0];
+  }
+
+  [NSThread detachNewThreadSelector:@selector(uploadThread:) toTarget:self withObject:mPost];
+}
+
+- (bool)setupPost {
+  NSURL* url =
+      [NSURL URLWithString:[NSSTR(gSendURL)
+                               stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
+  if (!url) return false;
+
+  mPost = [[HTTPMultipartUpload alloc] initWithURL:url];
+  if (!mPost) return false;
+
+  for (StringTable::const_iterator i = gFiles.begin(); i != gFiles.end(); i++) {
+    [mPost addFileAtPath:NSSTR(i->second) name:NSSTR(i->first)];
+  }
+
+  Json::StreamWriterBuilder builder;
+  builder["indentation"] = "";
+  string output = writeString(builder, gQueryParameters).append("\r\n");
+  NSMutableString* parameters = [[NSMutableString alloc] initWithUTF8String:output.c_str()];
+
+  [mPost setParameters:parameters];
+  [parameters release];
+
+  return true;
+}
+
+- (void)uploadComplete:(NSData*)data {
+  NSHTTPURLResponse* response = [mPost response];
+  [mPost release];
+
+  bool success;
+  string reply;
+  if (!data || !response || [response statusCode] != 200) {
+    success = false;
+    reply = "";
+
+    // if data is nil, we probably logged an error in uploadThread
+    if (data != nil && response != nil) {
+      ostringstream message;
+      message << "Crash report submission failed: server returned status " << [response statusCode];
+      LogMessage(message.str());
+    }
+  } else {
+    success = true;
+    LogMessage("Crash report submitted successfully");
+
+    NSString* encodingName = [response textEncodingName];
+    NSStringEncoding encoding;
+    if (encodingName) {
+      encoding = CFStringConvertEncodingToNSStringEncoding(
+          CFStringConvertIANACharSetNameToEncoding((CFStringRef)encodingName));
+    } else {
+      encoding = NSISOLatin1StringEncoding;
+    }
+    NSString* r = [[NSString alloc] initWithData:data encoding:encoding];
+    reply = [r UTF8String];
+    [r release];
+  }
+
+  SendCompleted(success, reply);
+
+  if (gAutoSubmit) {
+    [NSApp terminate:self];
+  }
+
+  [mProgressIndicator stopAnimation:self];
+  if (success) {
+    [self setStringFitVertically:mProgressText string:Str(ST_REPORTSUBMITSUCCESS) resizeWindow:YES];
+  } else {
+    [self setStringFitVertically:mProgressText string:Str(ST_SUBMITFAILED) resizeWindow:YES];
+  }
+  // quit after 5 seconds
+  [self performSelector:@selector(closeMeDown:) withObject:nil afterDelay:5.0];
+}
+
+- (void)uploadThread:(HTTPMultipartUpload*)post {
+  NSAutoreleasePool* autoreleasepool = [[NSAutoreleasePool alloc] init];
+  NSError* error = nil;
+  NSData* data = [post send:&error];
+  if (error) {
+    data = nil;
+    NSString* errorDesc = [error localizedDescription];
+    string message = [errorDesc UTF8String];
+    LogMessage("Crash report submission failed: " + message);
+  }
+
+  [self performSelectorOnMainThread:@selector(uploadComplete:) withObject:data waitUntilDone:YES];
+
+  [autoreleasepool release];
+}
+
+// to get auto-quit when we close the window
+- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication*)theApplication {
+  return YES;
+}
+
+- (void)applicationWillTerminate:(NSNotification*)aNotification {
+  // since we use [NSApp terminate:] we never return to main,
+  // so do our cleanup here
+  if (!gDidTrySend) DeleteDump();
+}
+
+@end
+
+@implementation TextViewWithPlaceHolder
+
+- (BOOL)becomeFirstResponder {
+  [self setNeedsDisplay:YES];
+  return [super becomeFirstResponder];
+}
+
+- (void)drawRect:(NSRect)rect {
+  [super drawRect:rect];
+  if (mPlaceHolderString && [[self string] isEqualToString:@""] &&
+      self != [[self window] firstResponder])
+    [mPlaceHolderString drawInRect:[self frame]];
+}
+
+- (BOOL)resignFirstResponder {
+  [self setNeedsDisplay:YES];
+  return [super resignFirstResponder];
+}
+
+- (void)setPlaceholder:(NSString*)placeholder {
+  NSColor* txtColor = [NSColor disabledControlTextColor];
+  NSDictionary* txtDict =
+      [NSDictionary dictionaryWithObjectsAndKeys:txtColor, NSForegroundColorAttributeName, nil];
+  mPlaceHolderString = [[NSMutableAttributedString alloc] initWithString:placeholder
+                                                              attributes:txtDict];
+  if (gRTLlayout)
+    [mPlaceHolderString setAlignment:NSTextAlignmentRight
+                               range:NSMakeRange(0, [placeholder length])];
+}
+
+- (void)insertTab:(id)sender {
+  // don't actually want to insert tabs, just tab to next control
+  [[self window] selectNextKeyView:sender];
+}
+
+- (void)insertBacktab:(id)sender {
+  [[self window] selectPreviousKeyView:sender];
+}
+
+- (void)setEnabled:(BOOL)enabled {
+  [self setSelectable:enabled];
+  [self setEditable:enabled];
+  if (![[self string] isEqualToString:@""]) {
+    NSAttributedString* colorString;
+    NSColor* txtColor;
+    if (enabled)
+      txtColor = [NSColor textColor];
+    else
+      txtColor = [NSColor disabledControlTextColor];
+    NSDictionary* txtDict =
+        [NSDictionary dictionaryWithObjectsAndKeys:txtColor, NSForegroundColorAttributeName, nil];
+    colorString = [[NSAttributedString alloc] initWithString:[self string] attributes:txtDict];
+    [[self textStorage] setAttributedString:colorString];
+    [self setInsertionPointColor:txtColor];
+    [colorString release];
+  }
+}
+
+- (void)dealloc {
+  [mPlaceHolderString release];
+  [super dealloc];
+}
+
+@end
+
+/* === Crashreporter UI Functions === */
+
+bool UIInit() {
+  gMainPool = [[NSAutoreleasePool alloc] init];
+  [NSApplication sharedApplication];
+
+  if (gStrings.find("isRTL") != gStrings.end() && gStrings["isRTL"] == "yes") gRTLlayout = true;
+
+  if (gAutoSubmit) {
+    gUI = [[CrashReporterUI alloc] init];
+  } else {
+    [[NSBundle mainBundle] loadNibNamed:(gRTLlayout ? @"MainMenuRTL" : @"MainMenu")
+                                  owner:NSApp
+                        topLevelObjects:nil];
+  }
+
+  return true;
+}
+
+void UIShutdown() { [gMainPool release]; }
+
+void UIShowDefaultUI() {
+  [gUI showErrorUI:gStrings[ST_CRASHREPORTERDEFAULT]];
+  [NSApp run];
+}
+
+bool UIShowCrashUI(const StringTable& files, const Json::Value& queryParameters,
+                   const string& sendURL, const vector<string>& restartArgs) {
+  gRestartArgs = restartArgs;
+
+  [gUI showCrashUI:files queryParameters:queryParameters sendURL:sendURL];
+  [NSApp run];
+
+  return gDidTrySend;
+}
+
+void UIError_impl(const string& message) {
+  if (!gUI) {
+    // UI failed to initialize, printing is the best we can do
+    printf("Error: %s\n", message.c_str());
+    return;
+  }
+
+  [gUI showErrorUI:message];
+  [NSApp run];
+}
+
+bool UIGetIniPath(string& path) {
+  NSString* tmpPath = [NSString stringWithUTF8String:gArgv[0]];
+  NSString* iniName = [tmpPath lastPathComponent];
+  iniName = [iniName stringByAppendingPathExtension:@"ini"];
+  tmpPath = [tmpPath stringByDeletingLastPathComponent];
+  tmpPath = [tmpPath stringByDeletingLastPathComponent];
+  tmpPath = [tmpPath stringByAppendingPathComponent:@"Resources"];
+  tmpPath = [tmpPath stringByAppendingPathComponent:iniName];
+  path = [tmpPath UTF8String];
+  return true;
+}
+
+bool UIGetSettingsPath(const string& vendor, const string& product, string& settingsPath) {
+  NSArray* paths =
+      NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
+  NSString* destPath = [paths firstObject];
+
+  // Note that MacOS ignores the vendor when creating the profile hierarchy -
+  // all application preferences directories live alongside one another in
+  // ~/Library/Application Support/
+  destPath = [destPath stringByAppendingPathComponent:NSSTR(product)];
+  // Thunderbird stores its profile in ~/Library/Thunderbird,
+  // but we're going to put stuff in ~/Library/Application Support/Thunderbird
+  // anyway, so we have to ensure that path exists.
+  string tempPath = [destPath UTF8String];
+  if (!UIEnsurePathExists(tempPath)) return false;
+
+  destPath = [destPath stringByAppendingPathComponent:@"Crash Reports"];
+
+  settingsPath = [destPath UTF8String];
+
+  return true;
+}
+
+bool UIMoveFile(const string& file, const string& newfile) {
+  if (!rename(file.c_str(), newfile.c_str())) return true;
+  if (errno != EXDEV) return false;
+
+  NSFileManager* fileManager = [NSFileManager defaultManager];
+  NSString* source = [fileManager stringWithFileSystemRepresentation:file.c_str()
+                                                              length:file.length()];
+  NSString* dest = [fileManager stringWithFileSystemRepresentation:newfile.c_str()
+                                                            length:newfile.length()];
+  if (!source || !dest) return false;
+
+  [fileManager moveItemAtPath:source toPath:dest error:NULL];
+  return UIFileExists(newfile);
+}
diff --git a/toolkit/crashreporter/client/crashreporter_unix_common.cpp b/toolkit/crashreporter/client/crashreporter_unix_common.cpp
new file mode 100644
index 0000000000..0cecc6262a
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_unix_common.cpp
@@ -0,0 +1,139 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "crashreporter.h"
+
+#include <algorithm>
+#include <sys/wait.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+using namespace CrashReporter;
+using std::ios_base;
+using std::sort;
+using std::string;
+using std::vector;
+
+struct FileData {
+  time_t timestamp;
+  string path;
+};
+
+static bool CompareFDTime(const FileData& fd1, const FileData& fd2) {
+  return fd1.timestamp > fd2.timestamp;
+}
+
+void UIPruneSavedDumps(const string& directory) {
+  DIR* dirfd = opendir(directory.c_str());
+  if (!dirfd) return;
+
+  vector<FileData> dumpfiles;
+
+  while (dirent* dir = readdir(dirfd)) {
+    FileData fd;
+    fd.path = directory + '/' + dir->d_name;
+    if (fd.path.size() < 5) continue;
+
+    if (fd.path.compare(fd.path.size() - 4, 4, ".dmp") != 0) continue;
+
+    struct stat st;
+    if (stat(fd.path.c_str(), &st)) {
+      closedir(dirfd);
+      return;
+    }
+
+    fd.timestamp = st.st_mtime;
+
+    dumpfiles.push_back(fd);
+  }
+
+  closedir(dirfd);
+
+  sort(dumpfiles.begin(), dumpfiles.end(), CompareFDTime);
+
+  while (dumpfiles.size() > kSaveCount) {
+    // get the path of the oldest file
+    string path = dumpfiles[dumpfiles.size() - 1].path;
+    UIDeleteFile(path.c_str());
+
+    // s/.dmp/.extra/
+    path.replace(path.size() - 4, 4, ".extra");
+    UIDeleteFile(path.c_str());
+
+    dumpfiles.pop_back();
+  }
+}
+
+bool UIRunProgram(const string& exename, const vector<string>& args,
+                  bool wait) {
+  pid_t pid = fork();
+
+  if (pid == -1) {
+    return false;
+  } else if (pid == 0) {
+    // Child
+    size_t argvLen = args.size() + 2;
+    vector<char*> argv(argvLen);
+
+    argv[0] = const_cast<char*>(exename.c_str());
+
+    for (size_t i = 0; i < args.size(); i++) {
+      argv[i + 1] = const_cast<char*>(args[i].c_str());
+    }
+
+    argv[argvLen - 1] = nullptr;
+
+    // Run the program
+    int rv = execv(exename.c_str(), argv.data());
+
+    if (rv == -1) {
+      exit(EXIT_FAILURE);
+    }
+  } else {
+    // Parent
+    if (wait) {
+      waitpid(pid, nullptr, 0);
+    }
+  }
+
+  return true;
+}
+
+bool UIEnsurePathExists(const string& path) {
+  int ret = mkdir(path.c_str(), S_IRWXU);
+  int e = errno;
+  if (ret == -1 && e != EEXIST) return false;
+
+  return true;
+}
+
+bool UIFileExists(const string& path) {
+  struct stat sb;
+  int ret = stat(path.c_str(), &sb);
+  if (ret == -1 || !(sb.st_mode & S_IFREG)) return false;
+
+  return true;
+}
+
+bool UIDeleteFile(const string& file) { return (unlink(file.c_str()) != -1); }
+
+std::ifstream* UIOpenRead(const string& filename, ios_base::openmode mode) {
+  return new std::ifstream(filename.c_str(), mode);
+}
+
+std::ofstream* UIOpenWrite(const string& filename, ios_base::openmode mode) {
+  return new std::ofstream(filename.c_str(), mode);
+}
+
+string UIGetEnv(const string& name) {
+  const char* var = getenv(name.c_str());
+  if (var && *var) {
+    return var;
+  }
+
+  return "";
+}
diff --git a/toolkit/crashreporter/client/crashreporter_win.cpp b/toolkit/crashreporter/client/crashreporter_win.cpp
new file mode 100644
index 0000000000..e680aa37c9
--- /dev/null
+++ b/toolkit/crashreporter/client/crashreporter_win.cpp
@@ -0,0 +1,1295 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef WIN32_LEAN_AND_MEAN
+#  undef WIN32_LEAN_AND_MEAN
+#endif
+
+#include "crashreporter.h"
+
+#include <windows.h>
+#include <versionhelpers.h>
+#include <commctrl.h>
+#include <richedit.h>
+#include <shellapi.h>
+#include <shlobj.h>
+#include <shlwapi.h>
+#include <math.h>
+#include <set>
+#include <algorithm>
+#include "resource.h"
+#include "windows/sender/crash_report_sender.h"
+#include "common/windows/string_utils-inl.h"
+
+#define SUBMIT_REPORT_VALUE L"SubmitCrashReport"
+#define INCLUDE_URL_VALUE L"IncludeURL"
+
+#define SENDURL_ORIGINAL L"https://crash-reports.mozilla.com/submit"
+#define SENDURL_XPSP2 L"https://crash-reports-xpsp2.mozilla.com/submit"
+
+#define WM_UPLOADCOMPLETE WM_APP
+
+// Thanks, Windows.h :(
+#undef min
+#undef max
+
+using std::ifstream;
+using std::ios;
+using std::ios_base;
+using std::map;
+using std::ofstream;
+using std::set;
+using std::string;
+using std::vector;
+using std::wstring;
+
+using namespace CrashReporter;
+
+typedef struct {
+  HWND hDlg;
+  Json::Value queryParameters;
+  map<wstring, wstring> files;
+  wstring sendURL;
+
+  wstring serverResponse;
+} SendThreadData;
+
+/*
+ * Per http://msdn2.microsoft.com/en-us/library/ms645398(VS.85).aspx
+ * "The DLGTEMPLATEEX structure is not defined in any standard header file.
+ * The structure definition is provided here to explain the format of an
+ * extended template for a dialog box.
+ */
+typedef struct {
+  WORD dlgVer;
+  WORD signature;
+  DWORD helpID;
+  DWORD exStyle;
+  // There's more to this struct, but it has weird variable-length
+  // members, and I only actually need to touch exStyle on an existing
+  // instance, so I've omitted the rest.
+} DLGTEMPLATEEX;
+
+static HANDLE gThreadHandle;
+static SendThreadData gSendData = {
+    0,
+};
+static vector<string> gRestartArgs;
+static Json::Value gQueryParameters;
+static wstring gCrashReporterKey(L"Software\\Mozilla\\Crash Reporter");
+static string gURLParameter;
+static int gCheckboxPadding = 6;
+static bool gRTLlayout = false;
+
+// When vertically resizing the dialog, these items should move down
+static set<UINT> gAttachedBottom;
+
+// Default set of items for gAttachedBottom
+static const UINT kDefaultAttachedBottom[] = {
+    IDC_SUBMITREPORTCHECK, IDC_VIEWREPORTBUTTON, IDC_COMMENTTEXT,
+    IDC_INCLUDEURLCHECK,   IDC_PROGRESSTEXT,     IDC_THROBBER,
+    IDC_CLOSEBUTTON,       IDC_RESTARTBUTTON,
+};
+
+static wstring UTF8ToWide(const string& utf8, bool* success = 0);
+static DWORD WINAPI SendThreadProc(LPVOID param);
+
+static wstring Str(const char* key) { return UTF8ToWide(gStrings[key]); }
+
+/* === win32 helper functions === */
+
+static void DoInitCommonControls() {
+  INITCOMMONCONTROLSEX ic;
+  ic.dwSize = sizeof(INITCOMMONCONTROLSEX);
+  ic.dwICC = ICC_PROGRESS_CLASS;
+  InitCommonControlsEx(&ic);
+  // also get the rich edit control
+  LoadLibrary(L"Msftedit.dll");
+}
+
+static bool GetBoolValue(HKEY hRegKey, LPCTSTR valueName, DWORD* value) {
+  DWORD type, dataSize;
+  dataSize = sizeof(DWORD);
+  if (RegQueryValueEx(hRegKey, valueName, nullptr, &type, (LPBYTE)value,
+                      &dataSize) == ERROR_SUCCESS &&
+      type == REG_DWORD)
+    return true;
+
+  return false;
+}
+
+static bool CheckBoolKey(const wchar_t* key, const wchar_t* valueName,
+                         bool* enabled) {
+  /*
+   * NOTE! This code needs to stay in sync with the preference checking
+   *       code in in nsExceptionHandler.cpp.
+   */
+  *enabled = false;
+  bool found = false;
+  HKEY hRegKey;
+  DWORD val;
+  // see if our reg key is set globally
+  if (RegOpenKey(HKEY_LOCAL_MACHINE, key, &hRegKey) == ERROR_SUCCESS) {
+    if (GetBoolValue(hRegKey, valueName, &val)) {
+      *enabled = (val == 1);
+      found = true;
+    }
+    RegCloseKey(hRegKey);
+  } else {
+    // look for it in user settings
+    if (RegOpenKey(HKEY_CURRENT_USER, key, &hRegKey) == ERROR_SUCCESS) {
+      if (GetBoolValue(hRegKey, valueName, &val)) {
+        *enabled = (val == 1);
+        found = true;
+      }
+      RegCloseKey(hRegKey);
+    }
+  }
+
+  return found;
+}
+
+static void SetBoolKey(const wchar_t* key, const wchar_t* value, bool enabled) {
+  /*
+   * NOTE! This code needs to stay in sync with the preference setting
+   *       code in in nsExceptionHandler.cpp.
+   */
+  HKEY hRegKey;
+
+  if (RegCreateKey(HKEY_CURRENT_USER, key, &hRegKey) == ERROR_SUCCESS) {
+    DWORD data = (enabled ? 1 : 0);
+    RegSetValueEx(hRegKey, value, 0, REG_DWORD, (LPBYTE)&data, sizeof(data));
+    RegCloseKey(hRegKey);
+  }
+}
+
+static string FormatLastError() {
+  DWORD err = GetLastError();
+  LPWSTR s;
+  string message = "Crash report submission failed: ";
+  // odds are it's a WinInet error
+  HANDLE hInetModule = GetModuleHandle(L"WinInet.dll");
+  if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                        FORMAT_MESSAGE_FROM_SYSTEM |
+                        FORMAT_MESSAGE_FROM_HMODULE,
+                    hInetModule, err, 0, (LPWSTR)&s, 0, nullptr) != 0) {
+    message += WideToUTF8(s, nullptr);
+    LocalFree(s);
+    // strip off any trailing newlines
+    string::size_type n = message.find_last_not_of("\r\n");
+    if (n < message.size() - 1) {
+      message.erase(n + 1);
+    }
+  } else {
+    char buf[64];
+    sprintf(buf, "Unknown error, error code: 0x%08x",
+            static_cast<unsigned int>(err));
+    message += buf;
+  }
+  return message;
+}
+
+#define TS_DRAW 2
+#define BP_CHECKBOX 3
+
+typedef HANDLE(WINAPI* OpenThemeDataPtr)(HWND hwnd, LPCWSTR pszClassList);
+typedef HRESULT(WINAPI* CloseThemeDataPtr)(HANDLE hTheme);
+typedef HRESULT(WINAPI* GetThemePartSizePtr)(HANDLE hTheme, HDC hdc,
+                                             int iPartId, int iStateId,
+                                             RECT* prc, int ts, SIZE* psz);
+typedef HRESULT(WINAPI* GetThemeContentRectPtr)(HANDLE hTheme, HDC hdc,
+                                                int iPartId, int iStateId,
+                                                const RECT* pRect,
+                                                RECT* pContentRect);
+
+static void GetThemeSizes(HWND hwnd) {
+  HMODULE themeDLL = LoadLibrary(L"uxtheme.dll");
+
+  if (!themeDLL) return;
+
+  OpenThemeDataPtr openTheme =
+      (OpenThemeDataPtr)GetProcAddress(themeDLL, "OpenThemeData");
+  CloseThemeDataPtr closeTheme =
+      (CloseThemeDataPtr)GetProcAddress(themeDLL, "CloseThemeData");
+  GetThemePartSizePtr getThemePartSize =
+      (GetThemePartSizePtr)GetProcAddress(themeDLL, "GetThemePartSize");
+
+  if (!openTheme || !closeTheme || !getThemePartSize) {
+    FreeLibrary(themeDLL);
+    return;
+  }
+
+  HANDLE buttonTheme = openTheme(hwnd, L"Button");
+  if (!buttonTheme) {
+    FreeLibrary(themeDLL);
+    return;
+  }
+  HDC hdc = GetDC(hwnd);
+  SIZE s;
+  getThemePartSize(buttonTheme, hdc, BP_CHECKBOX, 0, nullptr, TS_DRAW, &s);
+  gCheckboxPadding = s.cx;
+  closeTheme(buttonTheme);
+  FreeLibrary(themeDLL);
+}
+
+// Gets the position of a window relative to another window's client area
+static void GetRelativeRect(HWND hwnd, HWND hwndParent, RECT* r) {
+  GetWindowRect(hwnd, r);
+  MapWindowPoints(nullptr, hwndParent, (POINT*)r, 2);
+}
+
+static void SetDlgItemVisible(HWND hwndDlg, UINT item, bool visible) {
+  HWND hwnd = GetDlgItem(hwndDlg, item);
+
+  ShowWindow(hwnd, visible ? SW_SHOW : SW_HIDE);
+}
+
+/* === Crash Reporting Dialog === */
+
+static void StretchDialog(HWND hwndDlg, int ydiff) {
+  RECT r;
+  GetWindowRect(hwndDlg, &r);
+  r.bottom += ydiff;
+  MoveWindow(hwndDlg, r.left, r.top, r.right - r.left, r.bottom - r.top, TRUE);
+}
+
+static void ReflowDialog(HWND hwndDlg, int ydiff) {
+  // Move items attached to the bottom down/up by as much as
+  // the window resize
+  for (set<UINT>::const_iterator item = gAttachedBottom.begin();
+       item != gAttachedBottom.end(); item++) {
+    RECT r;
+    HWND hwnd = GetDlgItem(hwndDlg, *item);
+    GetRelativeRect(hwnd, hwndDlg, &r);
+    r.top += ydiff;
+    r.bottom += ydiff;
+    MoveWindow(hwnd, r.left, r.top, r.right - r.left, r.bottom - r.top, TRUE);
+  }
+}
+
+static DWORD WINAPI SendThreadProc(LPVOID param) {
+  bool finishedOk;
+  SendThreadData* td = (SendThreadData*)param;
+
+  if (td->sendURL.empty()) {
+    finishedOk = false;
+    LogMessage("No server URL, not sending report");
+  } else {
+    Json::StreamWriterBuilder builder;
+    builder["indentation"] = "";
+    string parameters(Json::writeString(builder, td->queryParameters));
+    google_breakpad::CrashReportSender sender(L"");
+    finishedOk = (sender.SendCrashReport(td->sendURL, parameters, td->files,
+                                         &td->serverResponse) ==
+                  google_breakpad::RESULT_SUCCEEDED);
+    if (finishedOk) {
+      LogMessage("Crash report submitted successfully");
+    } else {
+      // get an error string and print it to the log
+      // XXX: would be nice to get the HTTP status code here, filed:
+      // http://code.google.com/p/google-breakpad/issues/detail?id=220
+      LogMessage(FormatLastError());
+    }
+  }
+
+  if (gAutoSubmit) {
+    // Ordinarily this is done on the main thread in CrashReporterDialogProc,
+    // for auto submit we don't run that and it should be safe to finish up
+    // here as is done on other platforms.
+    SendCompleted(finishedOk, WideToUTF8(gSendData.serverResponse));
+  } else {
+    PostMessage(td->hDlg, WM_UPLOADCOMPLETE, finishedOk ? 1 : 0, 0);
+  }
+
+  return 0;
+}
+
+static void EndCrashReporterDialog(HWND hwndDlg, int code) {
+  // Save the current values to the registry
+  SetBoolKey(gCrashReporterKey.c_str(), INCLUDE_URL_VALUE,
+             IsDlgButtonChecked(hwndDlg, IDC_INCLUDEURLCHECK) != 0);
+  SetBoolKey(gCrashReporterKey.c_str(), SUBMIT_REPORT_VALUE,
+             IsDlgButtonChecked(hwndDlg, IDC_SUBMITREPORTCHECK) != 0);
+
+  EndDialog(hwndDlg, code);
+}
+
+static void MaybeResizeProgressText(HWND hwndDlg) {
+  HWND hwndProgress = GetDlgItem(hwndDlg, IDC_PROGRESSTEXT);
+  HDC hdc = GetDC(hwndProgress);
+  HFONT hfont = (HFONT)SendMessage(hwndProgress, WM_GETFONT, 0, 0);
+  if (hfont) SelectObject(hdc, hfont);
+  SIZE size;
+  RECT rect;
+  GetRelativeRect(hwndProgress, hwndDlg, &rect);
+
+  wchar_t text[1024];
+  GetWindowText(hwndProgress, text, 1024);
+
+  if (!GetTextExtentPoint32(hdc, text, wcslen(text), &size)) return;
+
+  if (size.cx < (rect.right - rect.left)) return;
+
+  // Figure out how much we need to resize things vertically
+  // This is sort of a fudge, but it should be good enough.
+  int wantedHeight =
+      size.cy * (int)ceil((float)size.cx / (float)(rect.right - rect.left));
+  int diff = wantedHeight - (rect.bottom - rect.top);
+  if (diff <= 0) return;
+
+  MoveWindow(hwndProgress, rect.left, rect.top, rect.right - rect.left,
+             wantedHeight, TRUE);
+
+  gAttachedBottom.clear();
+  gAttachedBottom.insert(IDC_CLOSEBUTTON);
+  gAttachedBottom.insert(IDC_RESTARTBUTTON);
+
+  StretchDialog(hwndDlg, diff);
+
+  for (size_t i = 0; i < sizeof(kDefaultAttachedBottom) / sizeof(UINT); i++) {
+    gAttachedBottom.insert(kDefaultAttachedBottom[i]);
+  }
+}
+
+static void MaybeSendReport(HWND hwndDlg) {
+  if (!IsDlgButtonChecked(hwndDlg, IDC_SUBMITREPORTCHECK)) {
+    EndCrashReporterDialog(hwndDlg, 0);
+    return;
+  }
+
+  // disable all the form controls
+  EnableWindow(GetDlgItem(hwndDlg, IDC_SUBMITREPORTCHECK), false);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_VIEWREPORTBUTTON), false);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_COMMENTTEXT), false);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_INCLUDEURLCHECK), false);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_CLOSEBUTTON), false);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_RESTARTBUTTON), false);
+
+  SetDlgItemText(hwndDlg, IDC_PROGRESSTEXT, Str(ST_REPORTDURINGSUBMIT).c_str());
+  MaybeResizeProgressText(hwndDlg);
+  // start throbber
+  // play entire AVI, and loop
+  Animate_Play(GetDlgItem(hwndDlg, IDC_THROBBER), 0, -1, -1);
+  SetDlgItemVisible(hwndDlg, IDC_THROBBER, true);
+  gThreadHandle = nullptr;
+  gSendData.hDlg = hwndDlg;
+  gSendData.queryParameters = gQueryParameters;
+
+  gThreadHandle =
+      CreateThread(nullptr, 0, SendThreadProc, &gSendData, 0, nullptr);
+}
+
+static void RestartApplication() {
+  wstring cmdLine;
+
+  for (unsigned int i = 0; i < gRestartArgs.size(); i++) {
+    cmdLine += L"\"" + UTF8ToWide(gRestartArgs[i]) + L"\" ";
+  }
+
+  STARTUPINFO si;
+  PROCESS_INFORMATION pi;
+
+  ZeroMemory(&si, sizeof(si));
+  si.cb = sizeof(si);
+  si.dwFlags = STARTF_USESHOWWINDOW;
+  si.wShowWindow = SW_SHOWNORMAL;
+  ZeroMemory(&pi, sizeof(pi));
+
+  if (CreateProcess(nullptr, (LPWSTR)cmdLine.c_str(), nullptr, nullptr, FALSE,
+                    0, nullptr, nullptr, &si, &pi)) {
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
+  }
+}
+
+static void ShowReportInfo(HWND hwndDlg) {
+  wstring description;
+
+  for (Json::ValueConstIterator iter = gQueryParameters.begin();
+       iter != gQueryParameters.end(); ++iter) {
+    description += UTF8ToWide(iter.name());
+    description += L": ";
+    string value;
+    if (iter->isString()) {
+      value = iter->asString();
+    } else {
+      Json::StreamWriterBuilder builder;
+      builder["indentation"] = "";
+      value = Json::writeString(builder, *iter);
+    }
+    description += UTF8ToWide(value);
+    description += L"\n";
+  }
+
+  description += L"\n";
+  description += Str(ST_EXTRAREPORTINFO);
+
+  SetDlgItemText(hwndDlg, IDC_VIEWREPORTTEXT, description.c_str());
+}
+
+static void UpdateURL(HWND hwndDlg) {
+  if (IsDlgButtonChecked(hwndDlg, IDC_INCLUDEURLCHECK)) {
+    gQueryParameters["URL"] = gURLParameter;
+  } else {
+    gQueryParameters.removeMember("URL");
+  }
+}
+
+static void UpdateComment(HWND hwndDlg) {
+  wchar_t comment[MAX_COMMENT_LENGTH + 1];
+  GetDlgItemTextW(hwndDlg, IDC_COMMENTTEXT, comment,
+                  sizeof(comment) / sizeof(comment[0]));
+  if (wcslen(comment) > 0)
+    gQueryParameters["Comments"] = WideToUTF8(comment);
+  else
+    gQueryParameters.removeMember("Comments");
+}
+
+/*
+ * Dialog procedure for the "view report" dialog.
+ */
+static BOOL CALLBACK ViewReportDialogProc(HWND hwndDlg, UINT message,
+                                          WPARAM wParam, LPARAM lParam) {
+  switch (message) {
+    case WM_INITDIALOG: {
+      SetWindowText(hwndDlg, Str(ST_VIEWREPORTTITLE).c_str());
+      SetDlgItemText(hwndDlg, IDOK, Str(ST_OK).c_str());
+      SendDlgItemMessage(hwndDlg, IDC_VIEWREPORTTEXT, EM_SETTARGETDEVICE,
+                         (WPARAM) nullptr, 0);
+      ShowReportInfo(hwndDlg);
+      SetFocus(GetDlgItem(hwndDlg, IDOK));
+      return FALSE;
+    }
+
+    case WM_COMMAND: {
+      if (HIWORD(wParam) == BN_CLICKED && LOWORD(wParam) == IDOK)
+        EndDialog(hwndDlg, 0);
+      return FALSE;
+    }
+  }
+  return FALSE;
+}
+
+// Return the number of bytes this string will take encoded
+// in UTF-8
+static inline int BytesInUTF8(wchar_t* str) {
+  // Just count size of buffer for UTF-8, minus one
+  // (we don't need to count the null terminator)
+  return WideCharToMultiByte(CP_UTF8, 0, str, -1, nullptr, 0, nullptr,
+                             nullptr) -
+         1;
+}
+
+// Calculate the length of the text in this edit control (in bytes,
+// in the UTF-8 encoding) after replacing the current selection
+// with |insert|.
+static int NewTextLength(HWND hwndEdit, wchar_t* insert) {
+  wchar_t current[MAX_COMMENT_LENGTH + 1];
+
+  GetWindowText(hwndEdit, current, MAX_COMMENT_LENGTH + 1);
+  DWORD selStart, selEnd;
+  SendMessage(hwndEdit, EM_GETSEL, (WPARAM)&selStart, (LPARAM)&selEnd);
+
+  int selectionLength = 0;
+  if (selEnd - selStart > 0) {
+    wchar_t selection[MAX_COMMENT_LENGTH + 1];
+    google_breakpad::WindowsStringUtils::safe_wcsncpy(
+        selection, MAX_COMMENT_LENGTH + 1, current + selStart,
+        selEnd - selStart);
+    selection[selEnd - selStart] = '\0';
+    selectionLength = BytesInUTF8(selection);
+  }
+
+  // current string length + replacement text length
+  // - replaced selection length
+  return BytesInUTF8(current) + BytesInUTF8(insert) - selectionLength;
+}
+
+// Window procedure for subclassing edit controls
+static LRESULT CALLBACK EditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam,
+                                         LPARAM lParam) {
+  static WNDPROC super = nullptr;
+
+  if (super == nullptr) super = (WNDPROC)GetWindowLongPtr(hwnd, GWLP_USERDATA);
+
+  switch (uMsg) {
+    case WM_PAINT: {
+      HDC hdc;
+      PAINTSTRUCT ps;
+      RECT r;
+      wchar_t windowText[1024];
+
+      GetWindowText(hwnd, windowText, 1024);
+      // if the control contains text or is focused, draw it normally
+      if (GetFocus() == hwnd || windowText[0] != '\0')
+        return CallWindowProc(super, hwnd, uMsg, wParam, lParam);
+
+      GetClientRect(hwnd, &r);
+      hdc = BeginPaint(hwnd, &ps);
+      FillRect(hdc, &r,
+               GetSysColorBrush(IsWindowEnabled(hwnd) ? COLOR_WINDOW
+                                                      : COLOR_BTNFACE));
+      SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT));
+      SelectObject(hdc, (HFONT)GetStockObject(DEFAULT_GUI_FONT));
+      SetBkMode(hdc, TRANSPARENT);
+      wchar_t* txt = (wchar_t*)GetProp(hwnd, L"PROP_GRAYTEXT");
+      // Get the actual edit control rect
+      CallWindowProc(super, hwnd, EM_GETRECT, 0, (LPARAM)&r);
+      UINT format = DT_EDITCONTROL | DT_NOPREFIX | DT_WORDBREAK | DT_INTERNAL;
+      if (gRTLlayout) format |= DT_RIGHT;
+      if (txt) DrawText(hdc, txt, wcslen(txt), &r, format);
+      EndPaint(hwnd, &ps);
+      return 0;
+    }
+
+      // We handle WM_CHAR and WM_PASTE to limit the comment box to 500
+      // bytes in UTF-8.
+    case WM_CHAR: {
+      // Leave accelerator keys and non-printing chars (except LF) alone
+      if (wParam & (1 << 24) || wParam & (1 << 29) ||
+          (wParam < ' ' && wParam != '\n'))
+        break;
+
+      wchar_t ch[2] = {(wchar_t)wParam, 0};
+      if (NewTextLength(hwnd, ch) > MAX_COMMENT_LENGTH) return 0;
+
+      break;
+    }
+
+    case WM_PASTE: {
+      if (IsClipboardFormatAvailable(CF_UNICODETEXT) && OpenClipboard(hwnd)) {
+        HGLOBAL hg = GetClipboardData(CF_UNICODETEXT);
+        wchar_t* pastedText = (wchar_t*)GlobalLock(hg);
+        int newSize = 0;
+
+        if (pastedText) newSize = NewTextLength(hwnd, pastedText);
+
+        GlobalUnlock(hg);
+        CloseClipboard();
+
+        if (newSize > MAX_COMMENT_LENGTH) return 0;
+      }
+      break;
+    }
+
+    case WM_SETFOCUS:
+    case WM_KILLFOCUS: {
+      RECT r;
+      GetClientRect(hwnd, &r);
+      InvalidateRect(hwnd, &r, TRUE);
+      break;
+    }
+
+    case WM_DESTROY: {
+      // cleanup our property
+      HGLOBAL hData = RemoveProp(hwnd, L"PROP_GRAYTEXT");
+      if (hData) GlobalFree(hData);
+    }
+  }
+
+  return CallWindowProc(super, hwnd, uMsg, wParam, lParam);
+}
+
+// Resize a control to fit this text
+static int ResizeControl(HWND hwndButton, RECT& rect, wstring text,
+                         bool shiftLeft, int userDefinedPadding) {
+  HDC hdc = GetDC(hwndButton);
+  HFONT hfont = (HFONT)SendMessage(hwndButton, WM_GETFONT, 0, 0);
+  if (hfont) SelectObject(hdc, hfont);
+  SIZE size, oldSize;
+  int sizeDiff = 0;
+
+  wchar_t oldText[1024];
+  GetWindowText(hwndButton, oldText, 1024);
+
+  if (GetTextExtentPoint32(hdc, text.c_str(), text.length(), &size)
+      // default text on the button
+      && GetTextExtentPoint32(hdc, oldText, wcslen(oldText), &oldSize)) {
+    /*
+     Expand control widths to accomidate wider text strings. For most
+     controls (including buttons) the text padding is defined by the
+     dialog's rc file. Some controls (such as checkboxes) have padding
+     that extends to the end of the dialog, in which case we ignore the
+     rc padding and rely on a user defined value passed in through
+     userDefinedPadding.
+    */
+    int textIncrease = size.cx - oldSize.cx;
+    if (textIncrease < 0) return 0;
+    int existingTextPadding;
+    if (userDefinedPadding == 0)
+      existingTextPadding = (rect.right - rect.left) - oldSize.cx;
+    else
+      existingTextPadding = userDefinedPadding;
+    sizeDiff = textIncrease + existingTextPadding;
+
+    if (shiftLeft) {
+      // shift left by the amount the button should grow
+      rect.left -= sizeDiff;
+    } else {
+      // grow right instead
+      rect.right += sizeDiff;
+    }
+    MoveWindow(hwndButton, rect.left, rect.top, rect.right - rect.left,
+               rect.bottom - rect.top, TRUE);
+  }
+  return sizeDiff;
+}
+
+// The window was resized horizontally, so widen some of our
+// controls to make use of the space
+static void StretchControlsToFit(HWND hwndDlg) {
+  int controls[] = {IDC_DESCRIPTIONTEXT, IDC_SUBMITREPORTCHECK, IDC_COMMENTTEXT,
+                    IDC_INCLUDEURLCHECK, IDC_PROGRESSTEXT};
+
+  RECT dlgRect;
+  GetClientRect(hwndDlg, &dlgRect);
+
+  for (size_t i = 0; i < sizeof(controls) / sizeof(controls[0]); i++) {
+    RECT r;
+    HWND hwndControl = GetDlgItem(hwndDlg, controls[i]);
+    GetRelativeRect(hwndControl, hwndDlg, &r);
+    // 6 pixel spacing on the right
+    if (r.right + 6 != dlgRect.right) {
+      r.right = dlgRect.right - 6;
+      MoveWindow(hwndControl, r.left, r.top, r.right - r.left, r.bottom - r.top,
+                 TRUE);
+    }
+  }
+}
+
+static void SubmitReportChecked(HWND hwndDlg) {
+  bool enabled = (IsDlgButtonChecked(hwndDlg, IDC_SUBMITREPORTCHECK) != 0);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_VIEWREPORTBUTTON), enabled);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_COMMENTTEXT), enabled);
+  EnableWindow(GetDlgItem(hwndDlg, IDC_INCLUDEURLCHECK), enabled);
+  SetDlgItemVisible(hwndDlg, IDC_PROGRESSTEXT, enabled);
+}
+
+static INT_PTR DialogBoxParamMaybeRTL(UINT idd, HWND hwndParent,
+                                      DLGPROC dlgProc, LPARAM param) {
+  INT_PTR rv = 0;
+  if (gRTLlayout) {
+    // We need to toggle the WS_EX_LAYOUTRTL style flag on the dialog
+    // template.
+    HRSRC hDialogRC = FindResource(nullptr, MAKEINTRESOURCE(idd), RT_DIALOG);
+    HGLOBAL hDlgTemplate = LoadResource(nullptr, hDialogRC);
+    DLGTEMPLATEEX* pDlgTemplate = (DLGTEMPLATEEX*)LockResource(hDlgTemplate);
+    unsigned long sizeDlg = SizeofResource(nullptr, hDialogRC);
+    HGLOBAL hMyDlgTemplate = GlobalAlloc(GPTR, sizeDlg);
+    DLGTEMPLATEEX* pMyDlgTemplate = (DLGTEMPLATEEX*)GlobalLock(hMyDlgTemplate);
+    memcpy(pMyDlgTemplate, pDlgTemplate, sizeDlg);
+
+    pMyDlgTemplate->exStyle |= WS_EX_LAYOUTRTL;
+
+    rv = DialogBoxIndirectParam(nullptr, (LPCDLGTEMPLATE)pMyDlgTemplate,
+                                hwndParent, dlgProc, param);
+    GlobalUnlock(hMyDlgTemplate);
+    GlobalFree(hMyDlgTemplate);
+  } else {
+    rv = DialogBoxParam(nullptr, MAKEINTRESOURCE(idd), hwndParent, dlgProc,
+                        param);
+  }
+
+  return rv;
+}
+
+static BOOL CALLBACK CrashReporterDialogProc(HWND hwndDlg, UINT message,
+                                             WPARAM wParam, LPARAM lParam) {
+  static int sHeight = 0;
+
+  bool success;
+  bool enabled;
+
+  switch (message) {
+    case WM_INITDIALOG: {
+      GetThemeSizes(hwndDlg);
+      RECT r;
+      GetClientRect(hwndDlg, &r);
+      sHeight = r.bottom - r.top;
+
+      SetWindowText(hwndDlg, Str(ST_CRASHREPORTERTITLE).c_str());
+      HICON hIcon =
+          LoadIcon(GetModuleHandle(nullptr), MAKEINTRESOURCE(IDI_MAINICON));
+      SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, (LPARAM)hIcon);
+      SendMessage(hwndDlg, WM_SETICON, ICON_BIG, (LPARAM)hIcon);
+
+      // resize the "View Report" button based on the string length
+      RECT rect;
+      HWND hwnd = GetDlgItem(hwndDlg, IDC_VIEWREPORTBUTTON);
+      GetRelativeRect(hwnd, hwndDlg, &rect);
+      ResizeControl(hwnd, rect, Str(ST_VIEWREPORT), false, 0);
+      SetDlgItemText(hwndDlg, IDC_VIEWREPORTBUTTON, Str(ST_VIEWREPORT).c_str());
+
+      hwnd = GetDlgItem(hwndDlg, IDC_SUBMITREPORTCHECK);
+      GetRelativeRect(hwnd, hwndDlg, &rect);
+      long maxdiff = ResizeControl(hwnd, rect, Str(ST_CHECKSUBMIT), false,
+                                   gCheckboxPadding);
+      SetDlgItemText(hwndDlg, IDC_SUBMITREPORTCHECK,
+                     Str(ST_CHECKSUBMIT).c_str());
+
+      if (!CheckBoolKey(gCrashReporterKey.c_str(), SUBMIT_REPORT_VALUE,
+                        &enabled))
+        enabled = true;
+
+      CheckDlgButton(hwndDlg, IDC_SUBMITREPORTCHECK,
+                     enabled ? BST_CHECKED : BST_UNCHECKED);
+      SubmitReportChecked(hwndDlg);
+
+      HWND hwndComment = GetDlgItem(hwndDlg, IDC_COMMENTTEXT);
+      WNDPROC OldWndProc = (WNDPROC)SetWindowLongPtr(
+          hwndComment, GWLP_WNDPROC, (LONG_PTR)EditSubclassProc);
+
+      // Subclass comment edit control to get placeholder text
+      SetWindowLongPtr(hwndComment, GWLP_USERDATA, (LONG_PTR)OldWndProc);
+      wstring commentGrayText = Str(ST_COMMENTGRAYTEXT);
+      wchar_t* hMem = (wchar_t*)GlobalAlloc(
+          GPTR, (commentGrayText.length() + 1) * sizeof(wchar_t));
+      wcscpy(hMem, commentGrayText.c_str());
+      SetProp(hwndComment, L"PROP_GRAYTEXT", hMem);
+
+      hwnd = GetDlgItem(hwndDlg, IDC_INCLUDEURLCHECK);
+      GetRelativeRect(hwnd, hwndDlg, &rect);
+      long diff =
+          ResizeControl(hwnd, rect, Str(ST_CHECKURL), false, gCheckboxPadding);
+      maxdiff = std::max(diff, maxdiff);
+      SetDlgItemText(hwndDlg, IDC_INCLUDEURLCHECK, Str(ST_CHECKURL).c_str());
+
+      // want this on by default
+      if (CheckBoolKey(gCrashReporterKey.c_str(), INCLUDE_URL_VALUE,
+                       &enabled) &&
+          !enabled) {
+        CheckDlgButton(hwndDlg, IDC_INCLUDEURLCHECK, BST_UNCHECKED);
+      } else {
+        CheckDlgButton(hwndDlg, IDC_INCLUDEURLCHECK, BST_CHECKED);
+      }
+
+      SetDlgItemText(hwndDlg, IDC_PROGRESSTEXT,
+                     Str(ST_REPORTPRESUBMIT).c_str());
+
+      RECT closeRect;
+      HWND hwndClose = GetDlgItem(hwndDlg, IDC_CLOSEBUTTON);
+      GetRelativeRect(hwndClose, hwndDlg, &closeRect);
+
+      RECT restartRect;
+      HWND hwndRestart = GetDlgItem(hwndDlg, IDC_RESTARTBUTTON);
+      GetRelativeRect(hwndRestart, hwndDlg, &restartRect);
+
+      // set the close button text and shift the buttons around
+      // since the size may need to change
+      int sizeDiff = ResizeControl(hwndClose, closeRect, Str(ST_QUIT), true, 0);
+      restartRect.left -= sizeDiff;
+      restartRect.right -= sizeDiff;
+      SetDlgItemText(hwndDlg, IDC_CLOSEBUTTON, Str(ST_QUIT).c_str());
+
+      if (gRestartArgs.size() > 0) {
+        // Resize restart button to fit text
+        ResizeControl(hwndRestart, restartRect, Str(ST_RESTART), true, 0);
+        SetDlgItemText(hwndDlg, IDC_RESTARTBUTTON, Str(ST_RESTART).c_str());
+      } else {
+        // No restart arguments, so just hide the restart button
+        SetDlgItemVisible(hwndDlg, IDC_RESTARTBUTTON, false);
+      }
+      // See if we need to widen the window
+      // Leave 6 pixels on either side + 6 pixels between the buttons
+      int neededSize = closeRect.right - closeRect.left + restartRect.right -
+                       restartRect.left + 6 * 3;
+      GetClientRect(hwndDlg, &r);
+      // We may already have resized one of the checkboxes above
+      maxdiff = std::max(maxdiff, neededSize - (r.right - r.left));
+
+      if (maxdiff > 0) {
+        // widen window
+        GetWindowRect(hwndDlg, &r);
+        r.right += maxdiff;
+        MoveWindow(hwndDlg, r.left, r.top, r.right - r.left, r.bottom - r.top,
+                   TRUE);
+        // shift both buttons right
+        if (restartRect.left + maxdiff < 6) maxdiff += 6;
+        closeRect.left += maxdiff;
+        closeRect.right += maxdiff;
+        restartRect.left += maxdiff;
+        restartRect.right += maxdiff;
+        MoveWindow(hwndClose, closeRect.left, closeRect.top,
+                   closeRect.right - closeRect.left,
+                   closeRect.bottom - closeRect.top, TRUE);
+        StretchControlsToFit(hwndDlg);
+      }
+      // need to move the restart button regardless
+      MoveWindow(hwndRestart, restartRect.left, restartRect.top,
+                 restartRect.right - restartRect.left,
+                 restartRect.bottom - restartRect.top, TRUE);
+
+      // Resize the description text last, in case the window was resized
+      // before this.
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_SETEVENTMASK,
+                         (WPARAM) nullptr, ENM_REQUESTRESIZE);
+
+      wstring description = Str(ST_CRASHREPORTERHEADER);
+      description += L"\n\n";
+      description += Str(ST_CRASHREPORTERDESCRIPTION);
+      SetDlgItemText(hwndDlg, IDC_DESCRIPTIONTEXT, description.c_str());
+
+      // Make the title bold.
+      CHARFORMAT fmt = {
+          0,
+      };
+      fmt.cbSize = sizeof(fmt);
+      fmt.dwMask = CFM_BOLD;
+      fmt.dwEffects = CFE_BOLD;
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_SETSEL, 0,
+                         Str(ST_CRASHREPORTERHEADER).length());
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_SETCHARFORMAT,
+                         SCF_SELECTION, (LPARAM)&fmt);
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_SETSEL, 0, 0);
+      // Force redraw.
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_SETTARGETDEVICE,
+                         (WPARAM) nullptr, 0);
+      // Force resize.
+      SendDlgItemMessage(hwndDlg, IDC_DESCRIPTIONTEXT, EM_REQUESTRESIZE, 0, 0);
+
+      // if no URL was given, hide the URL checkbox
+      if (!gQueryParameters.isMember("URL")) {
+        RECT urlCheckRect;
+        GetWindowRect(GetDlgItem(hwndDlg, IDC_INCLUDEURLCHECK), &urlCheckRect);
+
+        SetDlgItemVisible(hwndDlg, IDC_INCLUDEURLCHECK, false);
+
+        gAttachedBottom.erase(IDC_VIEWREPORTBUTTON);
+        gAttachedBottom.erase(IDC_SUBMITREPORTCHECK);
+        gAttachedBottom.erase(IDC_COMMENTTEXT);
+
+        StretchDialog(hwndDlg, urlCheckRect.top - urlCheckRect.bottom);
+
+        gAttachedBottom.insert(IDC_VIEWREPORTBUTTON);
+        gAttachedBottom.insert(IDC_SUBMITREPORTCHECK);
+        gAttachedBottom.insert(IDC_COMMENTTEXT);
+      }
+
+      MaybeResizeProgressText(hwndDlg);
+
+      // Open the AVI resource for the throbber
+      Animate_Open(GetDlgItem(hwndDlg, IDC_THROBBER),
+                   MAKEINTRESOURCE(IDR_THROBBER));
+
+      UpdateURL(hwndDlg);
+
+      SetFocus(GetDlgItem(hwndDlg, IDC_SUBMITREPORTCHECK));
+      return FALSE;
+    }
+    case WM_SIZE: {
+      ReflowDialog(hwndDlg, HIWORD(lParam) - sHeight);
+      sHeight = HIWORD(lParam);
+      InvalidateRect(hwndDlg, nullptr, TRUE);
+      return FALSE;
+    }
+    case WM_NOTIFY: {
+      NMHDR* notification = reinterpret_cast<NMHDR*>(lParam);
+      if (notification->code == EN_REQUESTRESIZE) {
+        // Resizing the rich edit control to fit the description text.
+        REQRESIZE* reqresize = reinterpret_cast<REQRESIZE*>(lParam);
+        RECT newSize = reqresize->rc;
+        RECT oldSize;
+        GetRelativeRect(notification->hwndFrom, hwndDlg, &oldSize);
+
+        // resize the text box as requested
+        MoveWindow(notification->hwndFrom, newSize.left, newSize.top,
+                   newSize.right - newSize.left, newSize.bottom - newSize.top,
+                   TRUE);
+
+        // Resize the dialog to fit (the WM_SIZE handler will move the controls)
+        StretchDialog(hwndDlg, newSize.bottom - oldSize.bottom);
+      }
+      return FALSE;
+    }
+    case WM_COMMAND: {
+      if (HIWORD(wParam) == BN_CLICKED) {
+        switch (LOWORD(wParam)) {
+          case IDC_VIEWREPORTBUTTON:
+            DialogBoxParamMaybeRTL(IDD_VIEWREPORTDIALOG, hwndDlg,
+                                   (DLGPROC)ViewReportDialogProc, 0);
+            break;
+          case IDC_SUBMITREPORTCHECK:
+            SubmitReportChecked(hwndDlg);
+            break;
+          case IDC_INCLUDEURLCHECK:
+            UpdateURL(hwndDlg);
+            break;
+          case IDC_CLOSEBUTTON:
+            MaybeSendReport(hwndDlg);
+            break;
+          case IDC_RESTARTBUTTON:
+            RestartApplication();
+            MaybeSendReport(hwndDlg);
+            break;
+        }
+      } else if (HIWORD(wParam) == EN_CHANGE) {
+        switch (LOWORD(wParam)) {
+          case IDC_COMMENTTEXT:
+            UpdateComment(hwndDlg);
+        }
+      }
+
+      return FALSE;
+    }
+    case WM_UPLOADCOMPLETE: {
+      WaitForSingleObject(gThreadHandle, INFINITE);
+      success = (wParam == 1);
+      SendCompleted(success, WideToUTF8(gSendData.serverResponse));
+      // hide throbber
+      Animate_Stop(GetDlgItem(hwndDlg, IDC_THROBBER));
+      SetDlgItemVisible(hwndDlg, IDC_THROBBER, false);
+
+      SetDlgItemText(hwndDlg, IDC_PROGRESSTEXT,
+                     success ? Str(ST_REPORTSUBMITSUCCESS).c_str()
+                             : Str(ST_SUBMITFAILED).c_str());
+      MaybeResizeProgressText(hwndDlg);
+      // close dialog after 5 seconds
+      SetTimer(hwndDlg, 0, 5000, nullptr);
+      //
+      return TRUE;
+    }
+
+    case WM_TIMER: {
+      // The "1" gets used down in UIShowCrashUI to indicate that we at least
+      // tried to send the report.
+      EndCrashReporterDialog(hwndDlg, 1);
+      return FALSE;
+    }
+
+    case WM_CLOSE: {
+      EndCrashReporterDialog(hwndDlg, 0);
+      return FALSE;
+    }
+  }
+  return FALSE;
+}
+
+static wstring UTF8ToWide(const string& utf8, bool* success) {
+  wchar_t* buffer = nullptr;
+  int buffer_size =
+      MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), -1, nullptr, 0);
+  if (buffer_size == 0) {
+    if (success) *success = false;
+    return L"";
+  }
+
+  buffer = new wchar_t[buffer_size];
+  if (buffer == nullptr) {
+    if (success) *success = false;
+    return L"";
+  }
+
+  MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), -1, buffer, buffer_size);
+  wstring str = buffer;
+  delete[] buffer;
+
+  if (success) *success = true;
+
+  return str;
+}
+
+static string WideToMBCP(const wstring& wide, unsigned int cp,
+                         bool* success = nullptr) {
+  char* buffer = nullptr;
+  int buffer_size = WideCharToMultiByte(cp, 0, wide.c_str(), -1, nullptr, 0,
+                                        nullptr, nullptr);
+  if (buffer_size == 0) {
+    if (success) *success = false;
+    return "";
+  }
+
+  buffer = new char[buffer_size];
+  if (buffer == nullptr) {
+    if (success) *success = false;
+    return "";
+  }
+
+  WideCharToMultiByte(cp, 0, wide.c_str(), -1, buffer, buffer_size, nullptr,
+                      nullptr);
+  string mb = buffer;
+  delete[] buffer;
+
+  if (success) *success = true;
+
+  return mb;
+}
+
+string WideToUTF8(const wstring& wide, bool* success) {
+  return WideToMBCP(wide, CP_UTF8, success);
+}
+
+/* === Crashreporter UI Functions === */
+
+bool UIInit() {
+  for (size_t i = 0; i < sizeof(kDefaultAttachedBottom) / sizeof(UINT); i++) {
+    gAttachedBottom.insert(kDefaultAttachedBottom[i]);
+  }
+
+  DoInitCommonControls();
+
+  return true;
+}
+
+void UIShutdown() {}
+
+void UIShowDefaultUI() {
+  MessageBox(nullptr, Str(ST_CRASHREPORTERDEFAULT).c_str(), L"Crash Reporter",
+             MB_OK | MB_ICONSTOP);
+}
+
+static bool CanUseMainCrashReportServer() {
+  // Any NT from 6.0 and above is fine.
+  if (IsWindowsVersionOrGreater(6, 0, 0)) {
+    return true;
+  }
+
+  // On NT 5 servers, we need Server 2003 SP2.
+  if (IsWindowsServer()) {
+    return IsWindowsVersionOrGreater(5, 2, 2);
+  }
+
+  // Otherwise we have an NT 5 client.
+  // We need exactly XP SP3 (version 5.1 SP3 but not version 5.2).
+  return (IsWindowsVersionOrGreater(5, 1, 3) &&
+          !IsWindowsVersionOrGreater(5, 2, 0));
+}
+
+bool UIShowCrashUI(const StringTable& files, const Json::Value& queryParameters,
+                   const string& sendURL, const vector<string>& restartArgs) {
+  gSendData.hDlg = nullptr;
+  gSendData.sendURL = UTF8ToWide(sendURL);
+
+  // Older Windows don't support the crash report server's crypto.
+  // This is a hack to use an alternate server.
+  if (!CanUseMainCrashReportServer() &&
+      gSendData.sendURL.find(SENDURL_ORIGINAL) == 0) {
+    gSendData.sendURL.replace(0, ARRAYSIZE(SENDURL_ORIGINAL) - 1,
+                              SENDURL_XPSP2);
+  }
+
+  for (StringTable::const_iterator i = files.begin(); i != files.end(); i++) {
+    gSendData.files[UTF8ToWide(i->first)] = UTF8ToWide(i->second);
+  }
+
+  gQueryParameters = queryParameters;
+
+  if (gQueryParameters.isMember("Vendor")) {
+    gCrashReporterKey = L"Software\\";
+    string vendor = gQueryParameters["Vendor"].asString();
+    if (!vendor.empty()) {
+      gCrashReporterKey += UTF8ToWide(vendor) + L"\\";
+    }
+    string productName = gQueryParameters["ProductName"].asString();
+    gCrashReporterKey += UTF8ToWide(productName) + L"\\Crash Reporter";
+  }
+
+  if (gQueryParameters.isMember("URL")) {
+    gURLParameter = gQueryParameters["URL"].asString();
+  }
+
+  gRestartArgs = restartArgs;
+
+  if (gStrings.find("isRTL") != gStrings.end() && gStrings["isRTL"] == "yes")
+    gRTLlayout = true;
+
+  if (gAutoSubmit) {
+    gSendData.queryParameters = gQueryParameters;
+
+    gThreadHandle =
+        CreateThread(nullptr, 0, SendThreadProc, &gSendData, 0, nullptr);
+    WaitForSingleObject(gThreadHandle, INFINITE);
+    // SendCompleted was called from SendThreadProc
+    return true;
+  }
+
+  return 1 == DialogBoxParamMaybeRTL(IDD_SENDDIALOG, nullptr,
+                                     (DLGPROC)CrashReporterDialogProc, 0);
+}
+
+void UIError_impl(const string& message) {
+  wstring title = Str(ST_CRASHREPORTERTITLE);
+  if (title.empty()) title = L"Crash Reporter Error";
+
+  MessageBox(nullptr, UTF8ToWide(message).c_str(), title.c_str(),
+             MB_OK | MB_ICONSTOP);
+}
+
+bool UIGetIniPath(string& path) {
+  wchar_t fileName[MAX_PATH];
+  if (GetModuleFileName(nullptr, fileName, MAX_PATH)) {
+    // get crashreporter ini
+    wchar_t* s = wcsrchr(fileName, '.');
+    if (s) {
+      wcscpy(s, L".ini");
+      path = WideToUTF8(fileName);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool UIGetSettingsPath(const string& vendor, const string& product,
+                       string& settings_path) {
+  wchar_t path[MAX_PATH] = {};
+  HRESULT hRes = SHGetFolderPath(nullptr, CSIDL_APPDATA, nullptr, 0, path);
+  if (FAILED(hRes)) {
+    // This provides a fallback for getting the path to APPDATA by querying the
+    // registry when the call to SHGetFolderPath is unable to provide this path
+    // (Bug 513958).
+    HKEY key;
+    DWORD type, dwRes;
+    DWORD size = sizeof(path) - 1;
+    dwRes = ::RegOpenKeyExW(HKEY_CURRENT_USER,
+                            L"Software\\Microsoft\\Windows\\CurrentVersion\\Exp"
+                            L"lorer\\Shell Folders",
+                            0, KEY_READ, &key);
+    if (dwRes != ERROR_SUCCESS) return false;
+
+    dwRes =
+        RegQueryValueExW(key, L"AppData", nullptr, &type, (LPBYTE)&path, &size);
+    ::RegCloseKey(key);
+    // The call to RegQueryValueExW must succeed, the type must be REG_SZ, the
+    // buffer size must not equal 0, and the buffer size be a multiple of 2.
+    if (dwRes != ERROR_SUCCESS || type != REG_SZ || size == 0 || size % 2 != 0)
+      return false;
+  }
+
+  if (!vendor.empty()) {
+    PathAppend(path, UTF8ToWide(vendor).c_str());
+  }
+  PathAppend(path, UTF8ToWide(product).c_str());
+  PathAppend(path, L"Crash Reports");
+  settings_path = WideToUTF8(path);
+  return true;
+}
+
+bool UIEnsurePathExists(const string& path) {
+  if (CreateDirectory(UTF8ToWide(path).c_str(), nullptr) == 0) {
+    if (GetLastError() != ERROR_ALREADY_EXISTS) return false;
+  }
+
+  return true;
+}
+
+bool UIFileExists(const string& path) {
+  DWORD attrs = GetFileAttributes(UTF8ToWide(path).c_str());
+  return (attrs != INVALID_FILE_ATTRIBUTES);
+}
+
+bool UIMoveFile(const string& oldfile, const string& newfile) {
+  if (oldfile == newfile) return true;
+
+  return MoveFile(UTF8ToWide(oldfile).c_str(), UTF8ToWide(newfile).c_str()) ==
+         TRUE;
+}
+
+bool UIDeleteFile(const string& oldfile) {
+  return DeleteFile(UTF8ToWide(oldfile).c_str()) == TRUE;
+}
+
+ifstream* UIOpenRead(const string& filename, ios_base::openmode mode) {
+#if defined(_MSC_VER)
+  ifstream* file = new ifstream();
+  file->open(UTF8ToWide(filename).c_str(), mode);
+#else   // GCC
+  ifstream* file =
+      new ifstream(WideToMBCP(UTF8ToWide(filename), CP_ACP).c_str(), mode);
+#endif  // _MSC_VER
+
+  return file;
+}
+
+ofstream* UIOpenWrite(const string& filename, ios_base::openmode mode) {
+#if defined(_MSC_VER)
+  ofstream* file = new ofstream();
+  file->open(UTF8ToWide(filename).c_str(), mode);
+#else   // GCC
+  ofstream* file =
+      new ofstream(WideToMBCP(UTF8ToWide(filename), CP_ACP).c_str(), mode);
+#endif  // _MSC_VER
+
+  return file;
+}
+
+struct FileData {
+  FILETIME timestamp;
+  wstring path;
+};
+
+static bool CompareFDTime(const FileData& fd1, const FileData& fd2) {
+  return CompareFileTime(&fd1.timestamp, &fd2.timestamp) > 0;
+}
+
+void UIPruneSavedDumps(const std::string& directory) {
+  wstring wdirectory = UTF8ToWide(directory);
+
+  WIN32_FIND_DATA fdata;
+  wstring findpath = wdirectory + L"\\*.dmp";
+  HANDLE dirlist = FindFirstFile(findpath.c_str(), &fdata);
+  if (dirlist == INVALID_HANDLE_VALUE) return;
+
+  vector<FileData> dumpfiles;
+
+  for (BOOL ok = true; ok; ok = FindNextFile(dirlist, &fdata)) {
+    FileData fd = {fdata.ftLastWriteTime, wdirectory + L"\\" + fdata.cFileName};
+    dumpfiles.push_back(fd);
+  }
+
+  sort(dumpfiles.begin(), dumpfiles.end(), CompareFDTime);
+
+  while (dumpfiles.size() > kSaveCount) {
+    // get the path of the oldest file
+    wstring path = (--dumpfiles.end())->path;
+    DeleteFile(path.c_str());
+
+    // s/.dmp/.extra/
+    path.replace(path.size() - 4, 4, L".extra");
+    DeleteFile(path.c_str());
+
+    dumpfiles.pop_back();
+  }
+  FindClose(dirlist);
+}
+
+bool UIRunProgram(const string& exename, const std::vector<std::string>& args,
+                  bool wait) {
+  wstring cmdLine = L"\"" + UTF8ToWide(exename) + L"\" ";
+
+  for (auto arg : args) {
+    cmdLine += L"\"" + UTF8ToWide(arg) + L"\" ";
+  }
+
+  STARTUPINFO si = {};
+  si.cb = sizeof(si);
+  PROCESS_INFORMATION pi = {};
+
+  if (!CreateProcess(/* lpApplicationName */ nullptr, (LPWSTR)cmdLine.c_str(),
+                     /* lpProcessAttributes */ nullptr,
+                     /* lpThreadAttributes */ nullptr,
+                     /* bInheritHandles */ false,
+                     NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW,
+                     /* lpEnvironment */ nullptr,
+                     /* lpCurrentDirectory */ nullptr, &si, &pi)) {
+    return false;
+  }
+
+  if (wait) {
+    WaitForSingleObject(pi.hProcess, INFINITE);
+  }
+
+  CloseHandle(pi.hProcess);
+  CloseHandle(pi.hThread);
+  return true;
+}
+
+string UIGetEnv(const string& name) {
+  const wchar_t* var = _wgetenv(UTF8ToWide(name).c_str());
+  if (var && *var) {
+    return WideToUTF8(var);
+  }
+
+  return "";
+}
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Info.plist b/toolkit/crashreporter/client/macbuild/Contents/Info.plist
new file mode 100644
index 0000000000..51d6c4de37
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Info.plist
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleDisplayName</key>
+	<string>crashreporter</string>
+	<key>CFBundleExecutable</key>
+	<string>crashreporter</string>
+	<key>CFBundleIconFile</key>
+	<string>crashreporter.icns</string>
+	<key>CFBundleIdentifier</key>
+	<string>org.mozilla.crashreporter</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>crashreporter</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>LSHasLocalizedDisplayName</key>
+	<true/>
+	<key>NSMainNibFile</key>
+	<string>MainMenu</string>
+	<key>NSRequiresAquaSystemAppearance</key>
+	<false/>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>LSUIElement</key>
+	<true/>
+</dict>
+</plist>
diff --git a/toolkit/crashreporter/client/macbuild/Contents/PkgInfo b/toolkit/crashreporter/client/macbuild/Contents/PkgInfo
new file mode 100644
index 0000000000..cae6d0a58f
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/PkgInfo
@@ -0,0 +1,2 @@
+APPL????
+
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/InfoPlist.strings.in b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/InfoPlist.strings.in
new file mode 100644
index 0000000000..e08ce59eb6
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/InfoPlist.strings.in
@@ -0,0 +1,8 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Localized versions of Info.plist keys */
+
+CFBundleName = "Crash Reporter";
+CFBundleDisplayName = "@APP_NAME@ Crash Reporter";
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/classes.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/classes.nib
new file mode 100644
index 0000000000..254131e431
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/classes.nib
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IBClasses</key>
+	<array>
+		<dict>
+			<key>ACTIONS</key>
+			<dict>
+				<key>closeClicked</key>
+				<string>id</string>
+				<key>includeURLClicked</key>
+				<string>id</string>
+				<key>restartClicked</key>
+				<string>id</string>
+				<key>submitReportClicked</key>
+				<string>id</string>
+				<key>viewReportClicked</key>
+				<string>id</string>
+				<key>viewReportOkClicked</key>
+				<string>id</string>
+			</dict>
+			<key>CLASS</key>
+			<string>CrashReporterUI</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>OUTLETS</key>
+			<dict>
+				<key>mCloseButton</key>
+				<string>NSButton</string>
+				<key>mCommentScrollView</key>
+				<string>NSScrollView</string>
+				<key>mCommentText</key>
+				<string>TextViewWithPlaceHolder</string>
+				<key>mDescriptionLabel</key>
+				<string>NSTextField</string>
+				<key>mEmailMeButton</key>
+				<string>NSButton</string>
+				<key>mEmailText</key>
+				<string>NSTextField</string>
+				<key>mErrorCloseButton</key>
+				<string>NSButton</string>
+				<key>mErrorHeaderLabel</key>
+				<string>NSTextField</string>
+				<key>mErrorLabel</key>
+				<string>NSTextField</string>
+				<key>mErrorView</key>
+				<string>NSView</string>
+				<key>mHeaderLabel</key>
+				<string>NSTextField</string>
+				<key>mIncludeURLButton</key>
+				<string>NSButton</string>
+				<key>mProgressIndicator</key>
+				<string>NSProgressIndicator</string>
+				<key>mProgressText</key>
+				<string>NSTextField</string>
+				<key>mRestartButton</key>
+				<string>NSButton</string>
+				<key>mSubmitReportButton</key>
+				<string>NSButton</string>
+				<key>mViewReportButton</key>
+				<string>NSButton</string>
+				<key>mViewReportOkButton</key>
+				<string>NSButton</string>
+				<key>mViewReportTextView</key>
+				<string>NSTextView</string>
+				<key>mViewReportWindow</key>
+				<string>NSWindow</string>
+				<key>mWindow</key>
+				<string>NSWindow</string>
+			</dict>
+			<key>SUPERCLASS</key>
+			<string>NSObject</string>
+		</dict>
+		<dict>
+			<key>ACTIONS</key>
+			<dict>
+				<key>insertTab</key>
+				<string>id</string>
+			</dict>
+			<key>CLASS</key>
+			<string>TextViewWithPlaceHolder</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>SUPERCLASS</key>
+			<string>NSTextView</string>
+		</dict>
+		<dict>
+			<key>CLASS</key>
+			<string>FirstResponder</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>SUPERCLASS</key>
+			<string>NSObject</string>
+		</dict>
+	</array>
+	<key>IBVersion</key>
+	<string>1</string>
+</dict>
+</plist>
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/info.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/info.nib
new file mode 100644
index 0000000000..517349ffce
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/info.nib
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IBFramework Version</key>
+	<string>629</string>
+	<key>IBOldestOS</key>
+	<integer>5</integer>
+	<key>IBOpenObjects</key>
+	<array>
+		<integer>2</integer>
+	</array>
+	<key>IBSystem Version</key>
+	<string>9C7010</string>
+	<key>targetFramework</key>
+	<string>IBCocoaFramework</string>
+</dict>
+</plist>
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/keyedobjects.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/keyedobjects.nib
new file mode 100644
index 0000000000..bfdcccb74c
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenu.nib/keyedobjects.nib
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/classes.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/classes.nib
new file mode 100644
index 0000000000..254131e431
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/classes.nib
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IBClasses</key>
+	<array>
+		<dict>
+			<key>ACTIONS</key>
+			<dict>
+				<key>closeClicked</key>
+				<string>id</string>
+				<key>includeURLClicked</key>
+				<string>id</string>
+				<key>restartClicked</key>
+				<string>id</string>
+				<key>submitReportClicked</key>
+				<string>id</string>
+				<key>viewReportClicked</key>
+				<string>id</string>
+				<key>viewReportOkClicked</key>
+				<string>id</string>
+			</dict>
+			<key>CLASS</key>
+			<string>CrashReporterUI</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>OUTLETS</key>
+			<dict>
+				<key>mCloseButton</key>
+				<string>NSButton</string>
+				<key>mCommentScrollView</key>
+				<string>NSScrollView</string>
+				<key>mCommentText</key>
+				<string>TextViewWithPlaceHolder</string>
+				<key>mDescriptionLabel</key>
+				<string>NSTextField</string>
+				<key>mEmailMeButton</key>
+				<string>NSButton</string>
+				<key>mEmailText</key>
+				<string>NSTextField</string>
+				<key>mErrorCloseButton</key>
+				<string>NSButton</string>
+				<key>mErrorHeaderLabel</key>
+				<string>NSTextField</string>
+				<key>mErrorLabel</key>
+				<string>NSTextField</string>
+				<key>mErrorView</key>
+				<string>NSView</string>
+				<key>mHeaderLabel</key>
+				<string>NSTextField</string>
+				<key>mIncludeURLButton</key>
+				<string>NSButton</string>
+				<key>mProgressIndicator</key>
+				<string>NSProgressIndicator</string>
+				<key>mProgressText</key>
+				<string>NSTextField</string>
+				<key>mRestartButton</key>
+				<string>NSButton</string>
+				<key>mSubmitReportButton</key>
+				<string>NSButton</string>
+				<key>mViewReportButton</key>
+				<string>NSButton</string>
+				<key>mViewReportOkButton</key>
+				<string>NSButton</string>
+				<key>mViewReportTextView</key>
+				<string>NSTextView</string>
+				<key>mViewReportWindow</key>
+				<string>NSWindow</string>
+				<key>mWindow</key>
+				<string>NSWindow</string>
+			</dict>
+			<key>SUPERCLASS</key>
+			<string>NSObject</string>
+		</dict>
+		<dict>
+			<key>ACTIONS</key>
+			<dict>
+				<key>insertTab</key>
+				<string>id</string>
+			</dict>
+			<key>CLASS</key>
+			<string>TextViewWithPlaceHolder</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>SUPERCLASS</key>
+			<string>NSTextView</string>
+		</dict>
+		<dict>
+			<key>CLASS</key>
+			<string>FirstResponder</string>
+			<key>LANGUAGE</key>
+			<string>ObjC</string>
+			<key>SUPERCLASS</key>
+			<string>NSObject</string>
+		</dict>
+	</array>
+	<key>IBVersion</key>
+	<string>1</string>
+</dict>
+</plist>
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/info.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/info.nib
new file mode 100644
index 0000000000..4a2251aaf5
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/info.nib
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IBFramework Version</key>
+	<string>629</string>
+	<key>IBOldestOS</key>
+	<integer>5</integer>
+	<key>IBOpenObjects</key>
+	<array>
+		<integer>2</integer>
+	</array>
+	<key>IBSystem Version</key>
+	<string>9D34</string>
+	<key>targetFramework</key>
+	<string>IBCocoaFramework</string>
+</dict>
+</plist>
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/keyedobjects.nib b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/keyedobjects.nib
new file mode 100644
index 0000000000..6c93849b94
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/English.lproj/MainMenuRTL.nib/keyedobjects.nib
diff --git a/toolkit/crashreporter/client/macbuild/Contents/Resources/crashreporter.icns b/toolkit/crashreporter/client/macbuild/Contents/Resources/crashreporter.icns
new file mode 100644
index 0000000000..341cd05a4d
--- /dev/null
+++ b/toolkit/crashreporter/client/macbuild/Contents/Resources/crashreporter.icns
diff --git a/toolkit/crashreporter/client/moz.build b/toolkit/crashreporter/client/moz.build
new file mode 100644
index 0000000000..f678ca1cd6
--- /dev/null
+++ b/toolkit/crashreporter/client/moz.build
@@ -0,0 +1,96 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["OS_TARGET"] != "Android":
+    Program("crashreporter")
+
+    UNIFIED_SOURCES += [
+        "../CrashAnnotations.cpp",
+        "crashreporter.cpp",
+        "ping.cpp",
+    ]
+
+    LOCAL_INCLUDES += [
+        "/toolkit/components/jsoncpp/include",
+    ]
+
+    USE_LIBS += [
+        "jsoncpp",
+    ]
+
+if CONFIG["OS_ARCH"] == "WINNT":
+    UNIFIED_SOURCES += [
+        "crashreporter_win.cpp",
+    ]
+    include("/toolkit/crashreporter/breakpad-client/windows/sender/objs.mozbuild")
+    SOURCES += objs_sender
+    SOURCES += [
+        "../google-breakpad/src/common/windows/http_upload.cc",
+    ]
+    DEFINES["UNICODE"] = True
+    DEFINES["_UNICODE"] = True
+    USE_LIBS += [
+        "nss",
+    ]
+    OS_LIBS += [
+        "advapi32",
+        "comctl32",
+        "gdi32",
+        "ole32",
+        "shell32",
+        "wininet",
+        "shlwapi",
+        "user32",
+    ]
+elif CONFIG["OS_ARCH"] == "Darwin":
+    UNIFIED_SOURCES += [
+        "../google-breakpad/src/common/mac/HTTPMultipartUpload.m",
+        "crashreporter_osx.mm",
+        "crashreporter_unix_common.cpp",
+    ]
+    LOCAL_INCLUDES += [
+        "../google-breakpad/src/common/mac",
+    ]
+    OS_LIBS += ["-framework Cocoa"]
+    USE_LIBS += [
+        "nss",
+    ]
+    LDFLAGS += ["-Wl,-rpath,@executable_path/../../../"]
+elif CONFIG["OS_ARCH"] == "SunOS":
+    SOURCES += [
+        "crashreporter_linux.cpp",
+        "crashreporter_unix.cpp",
+    ]
+    USE_LIBS += [
+        "breakpad_solaris_common_s",
+    ]
+
+if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk":
+    UNIFIED_SOURCES += [
+        "../google-breakpad/src/common/linux/http_upload.cc",
+        "crashreporter_gtk_common.cpp",
+        "crashreporter_linux.cpp",
+        "crashreporter_unix_common.cpp",
+    ]
+    OS_LIBS += CONFIG["MOZ_GTK3_LIBS"]
+    OS_LIBS += CONFIG["MOZ_GTHREAD_LIBS"]
+    CXXFLAGS += CONFIG["MOZ_GTK3_CFLAGS"]
+    CXXFLAGS += CONFIG["MOZ_GTHREAD_CFLAGS"]
+
+if CONFIG["OS_ARCH"] == "Linux" or CONFIG["OS_ARCH"] == "SunOS":
+    FINAL_TARGET_FILES += [
+        "Throbber-small.gif",
+    ]
+
+DEFINES["BIN_SUFFIX"] = '"%s"' % CONFIG["BIN_SUFFIX"]
+
+RCINCLUDE = "crashreporter.rc"
+
+# Don't use the STL wrappers in the crashreporter clients; they don't
+# link with -lmozalloc, and it really doesn't matter here anyway.
+DisableStlWrapping()
+
+include("/toolkit/crashreporter/crashreporter.mozbuild")
diff --git a/toolkit/crashreporter/client/ping.cpp b/toolkit/crashreporter/client/ping.cpp
new file mode 100644
index 0000000000..72dc163de2
--- /dev/null
+++ b/toolkit/crashreporter/client/ping.cpp
@@ -0,0 +1,324 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "crashreporter.h"
+
+#include <cstring>
+#include <ctime>
+#include <string>
+
+#if defined(XP_LINUX)
+#  include <fcntl.h>
+#  include <unistd.h>
+#  include <sys/stat.h>
+#elif defined(XP_MACOSX)
+#  include <CoreFoundation/CoreFoundation.h>
+#elif defined(XP_WIN)
+#  include <objbase.h>
+#endif
+
+#include "json/json.h"
+
+#include "CrashAnnotations.h"
+
+using std::string;
+
+namespace CrashReporter {
+
+struct UUID {
+  uint32_t m0;
+  uint16_t m1;
+  uint16_t m2;
+  uint8_t m3[8];
+};
+
+// Generates an UUID; the code here is mostly copied from nsUUIDGenerator.cpp
+static string GenerateUUID() {
+  UUID id = {};
+
+#if defined(XP_WIN)  // Windows
+  HRESULT hr = CoCreateGuid((GUID*)&id);
+  if (FAILED(hr)) {
+    return "";
+  }
+#elif defined(XP_MACOSX)            // MacOS X
+  CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault);
+  if (!uuid) {
+    return "";
+  }
+
+  CFUUIDBytes bytes = CFUUIDGetUUIDBytes(uuid);
+  memcpy(&id, &bytes, sizeof(UUID));
+
+  CFRelease(uuid);
+#elif defined(HAVE_ARC4RANDOM_BUF)  // Android, BSD, ...
+  arc4random_buf(&id, sizeof(UUID));
+#else                               // Linux
+  int fd = open("/dev/urandom", O_RDONLY);
+
+  if (fd == -1) {
+    return "";
+  }
+
+  if (read(fd, &id, sizeof(UUID)) != sizeof(UUID)) {
+    close(fd);
+    return "";
+  }
+
+  close(fd);
+#endif
+
+  /* Put in the version */
+  id.m2 &= 0x0fff;
+  id.m2 |= 0x4000;
+
+  /* Put in the variant */
+  id.m3[0] &= 0x3f;
+  id.m3[0] |= 0x80;
+
+  const char* kUUIDFormatString =
+      "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x";
+  const size_t kUUIDFormatStringLength = 36;
+  char str[kUUIDFormatStringLength + 1] = {'\0'};
+
+  int num = snprintf(str, kUUIDFormatStringLength + 1, kUUIDFormatString, id.m0,
+                     id.m1, id.m2, id.m3[0], id.m3[1], id.m3[2], id.m3[3],
+                     id.m3[4], id.m3[5], id.m3[6], id.m3[7]);
+
+  if (num != kUUIDFormatStringLength) {
+    return "";
+  }
+
+  return str;
+}
+
+const char kISO8601Date[] = "%F";
+const char kISO8601DateHours[] = "%FT%H:00:00.000Z";
+
+// Return the current date as a string in the specified format, the following
+// constants are provided:
+// - kISO8601Date, the ISO 8601 date format, YYYY-MM-DD
+// - kISO8601DateHours, the ISO 8601 full date format, YYYY-MM-DDTHH:00:00.000Z
+static string CurrentDate(string format) {
+  time_t now;
+  time(&now);
+  char buf[64];  // This should be plenty
+  strftime(buf, sizeof buf, format.c_str(), gmtime(&now));
+  return buf;
+}
+
+const char kTelemetryClientId[] = "TelemetryClientId";
+const char kTelemetryUrl[] = "TelemetryServerURL";
+const char kTelemetrySessionId[] = "TelemetrySessionId";
+const int kTelemetryVersion = 4;
+
+// Create the payload.metadata node of the crash ping using fields extracted
+// from the .extra file
+static Json::Value CreateMetadataNode(const Json::Value& aExtra) {
+  Json::Value node;
+
+  for (Json::ValueConstIterator iter = aExtra.begin(); iter != aExtra.end();
+       ++iter) {
+    Annotation annotation;
+
+    if (AnnotationFromString(annotation, iter.memberName())) {
+      if (IsAnnotationAllowlistedForPing(annotation)) {
+        node[iter.memberName()] = *iter;
+      }
+    }
+  }
+
+  return node;
+}
+
+// Create the payload node of the crash ping
+static Json::Value CreatePayloadNode(const Json::Value& aExtra,
+                                     const string& aHash,
+                                     const string& aSessionId) {
+  Json::Value payload;
+
+  payload["sessionId"] = aSessionId;
+  payload["version"] = 1;
+  payload["crashDate"] = CurrentDate(kISO8601Date);
+  payload["crashTime"] = CurrentDate(kISO8601DateHours);
+  payload["hasCrashEnvironment"] = true;
+  payload["crashId"] = CrashReporter::GetDumpLocalID();
+  payload["minidumpSha256Hash"] = aHash;
+  payload["processType"] = "main";  // This is always a main crash
+  if (aExtra.isMember("StackTraces")) {
+    payload["stackTraces"] = aExtra["StackTraces"];
+  }
+
+  // Assemble the payload metadata
+  payload["metadata"] = CreateMetadataNode(aExtra);
+
+  return payload;
+}
+
+// Create the application node of the crash ping
+static Json::Value CreateApplicationNode(
+    const string& aVendor, const string& aName, const string& aVersion,
+    const string& aDisplayVersion, const string& aPlatformVersion,
+    const string& aChannel, const string& aBuildId, const string& aArchitecture,
+    const string& aXpcomAbi) {
+  Json::Value application;
+
+  application["vendor"] = aVendor;
+  application["name"] = aName;
+  application["buildId"] = aBuildId;
+  application["displayVersion"] = aDisplayVersion;
+  application["platformVersion"] = aPlatformVersion;
+  application["version"] = aVersion;
+  application["channel"] = aChannel;
+  if (!aArchitecture.empty()) {
+    application["architecture"] = aArchitecture;
+  }
+  if (!aXpcomAbi.empty()) {
+    application["xpcomAbi"] = aXpcomAbi;
+  }
+
+  return application;
+}
+
+// Create the root node of the crash ping
+static Json::Value CreateRootNode(
+    const Json::Value& aExtra, const string& aUuid, const string& aHash,
+    const string& aClientId, const string& aSessionId, const string& aName,
+    const string& aVersion, const string& aChannel, const string& aBuildId) {
+  Json::Value root;
+  root["type"] = "crash";  // This is a crash ping
+  root["id"] = aUuid;
+  root["version"] = kTelemetryVersion;
+  root["creationDate"] = CurrentDate(kISO8601DateHours);
+  root["clientId"] = aClientId;
+
+  // Parse the telemetry environment
+  Json::Value environment;
+  Json::Reader reader;
+  string architecture;
+  string xpcomAbi;
+  string displayVersion;
+  string platformVersion;
+
+  if (reader.parse(aExtra["TelemetryEnvironment"].asString(), environment,
+                   /* collectComments */ false)) {
+    if (environment.isMember("build") && environment["build"].isObject()) {
+      Json::Value build = environment["build"];
+      if (build.isMember("architecture") && build["architecture"].isString()) {
+        architecture = build["architecture"].asString();
+      }
+      if (build.isMember("xpcomAbi") && build["xpcomAbi"].isString()) {
+        xpcomAbi = build["xpcomAbi"].asString();
+      }
+      if (build.isMember("displayVersion") &&
+          build["displayVersion"].isString()) {
+        displayVersion = build["displayVersion"].asString();
+      }
+      if (build.isMember("platformVersion") &&
+          build["platformVersion"].isString()) {
+        platformVersion = build["platformVersion"].asString();
+      }
+    }
+
+    root["environment"] = environment;
+  }
+
+  root["payload"] = CreatePayloadNode(aExtra, aHash, aSessionId);
+  root["application"] = CreateApplicationNode(
+      aExtra["Vendor"].asString(), aName, aVersion, displayVersion,
+      platformVersion, aChannel, aBuildId, architecture, xpcomAbi);
+
+  return root;
+}
+
+// Generates the URL used to submit the crash ping, see TelemetrySend.sys.mjs
+string GenerateSubmissionUrl(const string& aUrl, const string& aId,
+                             const string& aName, const string& aVersion,
+                             const string& aChannel, const string& aBuildId) {
+  return aUrl + "/submit/telemetry/" + aId + "/crash/" + aName + "/" +
+         aVersion + "/" + aChannel + "/" + aBuildId +
+         "?v=" + std::to_string(kTelemetryVersion);
+}
+
+// Write out the ping into the specified file.
+//
+// Returns true if the ping was written out successfully, false otherwise.
+static bool WritePing(const string& aPath, const string& aPing) {
+  std::ofstream* f = UIOpenWrite(aPath, std::ios::trunc);
+  bool success = false;
+
+  if (f->is_open()) {
+    *f << aPing;
+    f->close();
+    success = f->good();
+  }
+
+  delete f;
+  return success;
+}
+
+// Assembles the crash ping using the JSON data extracted from the .extra file
+// and sends it using the crash sender. All the telemetry specific data but the
+// environment will be stripped from the annotations so that it won't be sent
+// together with the crash report.
+//
+// Note that the crash ping sender is invoked in a fire-and-forget way so this
+// won't block waiting for the ping to be delivered.
+//
+// Returns true if the ping was assembled and handed over to the pingsender
+// correctly, also populates the aPingUuid parameter with the ping UUID. Returns
+// false otherwise and leaves the aPingUuid parameter unmodified.
+bool SendCrashPing(Json::Value& aExtra, const string& aHash, string& aPingUuid,
+                   const string& pingDir) {
+  // Remove the telemetry-related data from the crash annotations
+  Json::Value value;
+  aExtra.removeMember(kTelemetryClientId, &value);
+  string clientId = value.asString();
+  aExtra.removeMember(kTelemetryUrl, &value);
+  string serverUrl = value.asString();
+  aExtra.removeMember(kTelemetrySessionId, &value);
+  string sessionId = value.asString();
+
+  if (clientId.empty() || serverUrl.empty() || sessionId.empty()) {
+    return false;
+  }
+
+  string buildId = aExtra["BuildID"].asString();
+  string channel = aExtra["ReleaseChannel"].asString();
+  string name = aExtra["ProductName"].asString();
+  string version = aExtra["Version"].asString();
+  string uuid = GenerateUUID();
+  string url =
+      GenerateSubmissionUrl(serverUrl, uuid, name, version, channel, buildId);
+
+  if (serverUrl.empty() || uuid.empty()) {
+    return false;
+  }
+
+  Json::Value root = CreateRootNode(aExtra, uuid, aHash, clientId, sessionId,
+                                    name, version, channel, buildId);
+
+  // Write out the result to the pending pings directory
+  Json::StreamWriterBuilder builder;
+  builder["indentation"] = "";
+  string ping = Json::writeString(builder, root);
+  string pingPath = pingDir + UI_DIR_SEPARATOR + uuid + ".json";
+
+  if (!WritePing(pingPath, ping)) {
+    return false;
+  }
+
+  // Hand over the ping to the sender
+  std::vector<string> args = {url, pingPath};
+  if (UIRunProgram(CrashReporter::GetProgramPath(UI_PING_SENDER_FILENAME),
+                   args)) {
+    aPingUuid = uuid;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+}  // namespace CrashReporter
diff --git a/toolkit/crashreporter/client/resource.h b/toolkit/crashreporter/client/resource.h
new file mode 100644
index 0000000000..2e7917daa4
--- /dev/null
+++ b/toolkit/crashreporter/client/resource.h
@@ -0,0 +1,35 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by crashreporter.rc
+//
+#define IDD_SENDDIALOG 102
+#define IDR_THROBBER 103
+#define IDD_VIEWREPORTDIALOG 104
+#define IDI_MAINICON 105
+#define IDC_PROGRESS 1003
+#define IDC_DESCRIPTIONTEXT 1004
+#define IDC_CLOSEBUTTON 1005
+#define IDC_VIEWREPORTBUTTON 1006
+#define IDC_SUBMITREPORTCHECK 1007
+#define IDC_INCLUDEURLCHECK 1010
+#define IDC_COMMENTTEXT 1011
+#define IDC_RESTARTBUTTON 1012
+#define IDC_DESCRIPTIONLABEL 1013
+#define IDC_PROGRESSTEXT 1014
+#define IDC_THROBBER 1015
+#define IDC_VIEWREPORTTEXT 1016
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#  ifndef APSTUDIO_READONLY_SYMBOLS
+#    define _APS_NEXT_RESOURCE_VALUE 106
+#    define _APS_NEXT_COMMAND_VALUE 40001
+#    define _APS_NEXT_CONTROL_VALUE 1017
+#    define _APS_NEXT_SYMED_VALUE 101
+#  endif
+#endif