Adding upstream version 124.0.1.upstream/124.0.1

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

27 files changed, 5908 insertions, 0 deletions

diff --git a/toolkit/xre/test/browser.toml b/toolkit/xre/test/browser.toml
new file mode 100644
index 0000000000..c1a885a201
--- /dev/null
+++ b/toolkit/xre/test/browser.toml
@@ -0,0 +1,5 @@
+[DEFAULT]
+
+["browser_checkdllblockliststate.js"]
+run-if = ["os == 'win'"]
+skip-if = ["ccov"] # Bug 1531789
diff --git a/toolkit/xre/test/browser_checkdllblockliststate.js b/toolkit/xre/test/browser_checkdllblockliststate.js
new file mode 100644
index 0000000000..759c9b3635
--- /dev/null
+++ b/toolkit/xre/test/browser_checkdllblockliststate.js
@@ -0,0 +1,17 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/publicdomain/zero/1.0/
+
+// Tests that the dll blocklist initializes correctly during test runs.
+add_task(async function test() {
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:blank" },
+    function (browser) {
+      ok(
+        Services.appinfo.windowsDLLBlocklistStatus,
+        "Windows dll blocklist status should be true, indicating it is " +
+          "running properly. A failure in this test is considered a " +
+          "release blocker."
+      );
+    }
+  );
+});
diff --git a/toolkit/xre/test/gtest/TestAssembleCommandLineWin.cpp b/toolkit/xre/test/gtest/TestAssembleCommandLineWin.cpp
new file mode 100644
index 0000000000..27e715eb6c
--- /dev/null
+++ b/toolkit/xre/test/gtest/TestAssembleCommandLineWin.cpp
@@ -0,0 +1,181 @@
+/* -*- 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 "gtest/gtest.h"
+
+#include "mozilla/AssembleCmdLine.h"
+#include "mozilla/CmdLineAndEnvUtils.h"
+#include "mozilla/gtest/MozAssertions.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "WinRemoteMessage.h"
+
+using namespace mozilla;
+
+template <typename T>
+struct TestCase {
+  const T* mArgs[4];
+  const wchar_t* mExpected;
+};
+
+#define ALPHA_IN_UTF8 "\xe3\x82\xa2\xe3\x83\xab\xe3\x83\x95\xe3\x82\xa1"
+#define OMEGA_IN_UTF8 "\xe3\x82\xaa\xe3\x83\xa1\xe3\x82\xac"
+#define ALPHA_IN_UTF16 L"\u30A2\u30EB\u30D5\u30A1"
+#define OMEGA_IN_UTF16 L"\u30AA\u30E1\u30AC"
+#define UPPER_CYRILLIC_P_IN_UTF8 "\xd0\xa0"
+#define LOWER_CYRILLIC_P_IN_UTF8 "\xd1\x80"
+#define UPPER_CYRILLIC_P_IN_UTF16 L"\u0420"
+#define LOWER_CYRILLIC_P_IN_UTF16 L"\u0440"
+
+TestCase<char> testCases[] = {
+    // Copied from TestXREMakeCommandLineWin.ini
+    {{"a:\\", nullptr}, L"a:\\"},
+    {{"a:\"", nullptr}, L"a:\\\""},
+    {{"a:\\b c", nullptr}, L"\"a:\\b c\""},
+    {{"a:\\b c\"", nullptr}, L"\"a:\\b c\\\"\""},
+    {{"a:\\b c\\d e", nullptr}, L"\"a:\\b c\\d e\""},
+    {{"a:\\b c\\d e\"", nullptr}, L"\"a:\\b c\\d e\\\"\""},
+    {{"a:\\", nullptr}, L"a:\\"},
+    {{"a:\"", "b:\\c d", nullptr}, L"a:\\\" \"b:\\c d\""},
+    {{"a", "b:\" c:\\d", "e", nullptr}, L"a \"b:\\\" c:\\d\" e"},
+    {{"abc", "d", "e", nullptr}, L"abc d e"},
+    {{"a b c", "d", "e", nullptr}, L"\"a b c\" d e"},
+    {{"a\\\\\\b", "de fg", "h", nullptr}, L"a\\\\\\b \"de fg\" h"},
+    {{"a", "b", nullptr}, L"a b"},
+    {{"a\tb", nullptr}, L"\"a\tb\""},
+    {{"a\\\"b", "c", "d", nullptr}, L"a\\\\\\\"b c d"},
+    {{"a\\\"b", "c", nullptr}, L"a\\\\\\\"b c"},
+    {{"a\\\\\\b c", nullptr}, L"\"a\\\\\\b c\""},
+    {{"\"a", nullptr}, L"\\\"a"},
+    {{"\\a", nullptr}, L"\\a"},
+    {{"\\\\\\a", nullptr}, L"\\\\\\a"},
+    {{"\\\\\\\"a", nullptr}, L"\\\\\\\\\\\\\\\"a"},
+    {{"a\\\"b c\" d e", nullptr}, L"\"a\\\\\\\"b c\\\" d e\""},
+    {{"a\\\\\"b", "c d e", nullptr}, L"a\\\\\\\\\\\"b \"c d e\""},
+    {{"a:\\b", "c\\" ALPHA_IN_UTF8, OMEGA_IN_UTF8 "\\d", nullptr},
+     L"a:\\b c\\" ALPHA_IN_UTF16 L" " OMEGA_IN_UTF16 L"\\d"},
+    {{"a:\\b", "c\\" ALPHA_IN_UTF8 " " OMEGA_IN_UTF8 "\\d", nullptr},
+     L"a:\\b \"c\\" ALPHA_IN_UTF16 L" " OMEGA_IN_UTF16 L"\\d\""},
+    {{ALPHA_IN_UTF8, OMEGA_IN_UTF8, nullptr},
+     ALPHA_IN_UTF16 L" " OMEGA_IN_UTF16},
+
+    // More single-argument cases
+    {{"a\fb", nullptr}, L"\"a\fb\""},
+    {{"a\nb", nullptr}, L"\"a\nb\""},
+    {{"a\rb", nullptr}, L"\"a\rb\""},
+    {{"a\vb", nullptr}, L"\"a\vb\""},
+    {{"\"a\" \"b\"", nullptr}, L"\"\\\"a\\\" \\\"b\\\"\""},
+    {{"\"a\\b\" \"c\\d\"", nullptr}, L"\"\\\"a\\b\\\" \\\"c\\d\\\"\""},
+    {{"\\\\ \\\\", nullptr}, L"\"\\\\ \\\\\\\\\""},
+    {{"\"\" \"\"", nullptr}, L"\"\\\"\\\" \\\"\\\"\""},
+    {{ALPHA_IN_UTF8 "\\" OMEGA_IN_UTF8, nullptr},
+     ALPHA_IN_UTF16 L"\\" OMEGA_IN_UTF16},
+    {{ALPHA_IN_UTF8 " " OMEGA_IN_UTF8, nullptr},
+     L"\"" ALPHA_IN_UTF16 L" " OMEGA_IN_UTF16 L"\""},
+
+    // Empty string cases
+    {{"", nullptr}, L"\"\""},
+    {{"foo", "", nullptr}, L"foo \"\""},
+    {{"", "bar", nullptr}, L"\"\" bar"},
+    {{"foo", "", "bar", nullptr}, L"foo \"\" bar"},
+};
+
+TEST(AssembleCommandLineWin, assembleCmdLine)
+{
+  for (const auto& testCase : testCases) {
+    UniqueFreePtr<wchar_t> assembled;
+    wchar_t* assembledRaw = nullptr;
+    EXPECT_EQ(assembleCmdLine(testCase.mArgs, &assembledRaw, CP_UTF8), 0);
+    assembled.reset(assembledRaw);
+
+    EXPECT_STREQ(assembled.get(), testCase.mExpected);
+  }
+}
+
+TEST(CommandLineParserWin, HandleCommandLine)
+{
+  CommandLineParserWin<char> parser;
+  for (const auto& testCase : testCases) {
+    NS_ConvertUTF16toUTF8 utf8(testCase.mExpected);
+    parser.HandleCommandLine(utf8);
+
+    if (utf8.Length() == 0) {
+      EXPECT_EQ(parser.Argc(), 0);
+      continue;
+    }
+
+    for (int i = 0; i < parser.Argc(); ++i) {
+      EXPECT_NE(testCase.mArgs[i], nullptr);
+      EXPECT_STREQ(parser.Argv()[i], testCase.mArgs[i]);
+    }
+    EXPECT_EQ(testCase.mArgs[parser.Argc()], nullptr);
+  }
+}
+
+TEST(WinRemoteMessage, SendReceive)
+{
+  const wchar_t kCommandlineW[] =
+      L"dummy.exe /arg1 --arg2 \"3rd arg\" "
+      L"4th=\"" UPPER_CYRILLIC_P_IN_UTF16 L" " LOWER_CYRILLIC_P_IN_UTF16 L"\"";
+  const wchar_t* kExpectedArgsW[] = {
+      L"-arg1", L"-arg2", L"3rd arg",
+      L"4th=" UPPER_CYRILLIC_P_IN_UTF16 L" " LOWER_CYRILLIC_P_IN_UTF16};
+
+  wchar_t workingDirW[MAX_PATH];
+  EXPECT_NE(_wgetcwd(workingDirW, MAX_PATH), nullptr);
+
+  WinRemoteMessageSender v2(kCommandlineW, workingDirW);
+
+  WinRemoteMessageReceiver receiver;
+  int32_t len;
+  nsAutoString arg;
+  nsCOMPtr<nsIFile> workingDir;
+
+  receiver.Parse(v2.CopyData());
+  EXPECT_NS_SUCCEEDED(receiver.CommandLineRunner()->GetLength(&len));
+  EXPECT_EQ(static_cast<size_t>(len), ArrayLength(kExpectedArgsW));
+  for (size_t i = 0; i < ArrayLength(kExpectedArgsW); ++i) {
+    EXPECT_TRUE(
+        NS_SUCCEEDED(receiver.CommandLineRunner()->GetArgument(i, arg)));
+    EXPECT_STREQ(arg.get(), kExpectedArgsW[i]);
+  }
+  EXPECT_TRUE(NS_SUCCEEDED(receiver.CommandLineRunner()->GetWorkingDirectory(
+      getter_AddRefs(workingDir))));
+  EXPECT_NS_SUCCEEDED(workingDir->GetPath(arg));
+  EXPECT_STREQ(arg.get(), workingDirW);
+}
+
+TEST(WinRemoteMessage, NonNullTerminatedBuffer)
+{
+  // Reserve two pages and commit the first one
+  const uint32_t kPageSize = 4096;
+  UniquePtr<void, VirtualFreeDeleter> pages(
+      ::VirtualAlloc(nullptr, kPageSize * 2, MEM_RESERVE, PAGE_NOACCESS));
+  EXPECT_TRUE(pages);
+  EXPECT_TRUE(
+      ::VirtualAlloc(pages.get(), kPageSize, MEM_COMMIT, PAGE_READWRITE));
+
+  // Test strings with lengths between 0 and |kMaxBufferSize| bytes
+  const int kMaxBufferSize = 10;
+
+  // Set a string just before the boundary between the two pages.
+  uint8_t* bufferEnd = reinterpret_cast<uint8_t*>(pages.get()) + kPageSize;
+  memset(bufferEnd - kMaxBufferSize, '$', kMaxBufferSize);
+
+  nsCOMPtr<nsIFile> workingDir;
+  COPYDATASTRUCT copyData = {};
+  for (int i = 0; i < kMaxBufferSize; ++i) {
+    WinRemoteMessageReceiver receiver;
+
+    copyData.cbData = i;
+    copyData.lpData = bufferEnd - i;
+
+    copyData.dwData = static_cast<ULONG_PTR>(
+        WinRemoteMessageVersion::CommandLineAndWorkingDirInUtf16);
+    EXPECT_NS_SUCCEEDED(receiver.Parse(&copyData));
+    EXPECT_EQ(receiver.CommandLineRunner()->GetWorkingDirectory(
+                  getter_AddRefs(workingDir)),
+              NS_ERROR_NOT_INITIALIZED);
+  }
+}
diff --git a/toolkit/xre/test/gtest/TestCmdLineAndEnvUtils.cpp b/toolkit/xre/test/gtest/TestCmdLineAndEnvUtils.cpp
new file mode 100644
index 0000000000..a5f8a19a9c
--- /dev/null
+++ b/toolkit/xre/test/gtest/TestCmdLineAndEnvUtils.cpp
@@ -0,0 +1,372 @@
+/* -*- 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 <memory>
+#include <ostream>
+#include <string>
+#include <string_view>
+#include <type_traits>
+#include <vector>
+
+#include "gtest/gtest.h"
+
+#include "mozilla/CmdLineAndEnvUtils.h"
+
+// Insulate these test-classes from the outside world.
+//
+// (In particular, distinguish this `CommandLine` from the one in ipc/chromium.
+// The compiler has no issues here, but the MSVC debugger gets somewhat
+// confused.)
+namespace testzilla {
+
+// Auxiliary class to simplify the declaration of test-cases for
+// EnsureCommandlineSafe.
+class CommandLine {
+  const size_t size;
+  std::vector<std::string> _data_8;
+  std::vector<std::wstring> _data_16;
+  // _should_ be const all the way through, but...
+  char const** argv_8;
+  wchar_t const** argv_16;
+
+ public:
+  inline int argc() const { return (int)(unsigned int)(size); }
+
+  template <typename CharT>
+  CharT const** argv() const;
+
+  CommandLine(CommandLine const&) = delete;
+  CommandLine(CommandLine&& that) = delete;
+
+  template <typename Container>
+  explicit CommandLine(Container const& container)
+      : size{std::size(container) + 1},     // plus one for argv[0]
+        argv_8(new const char*[size + 1]),  // plus one again for argv[argc]
+        argv_16(new const wchar_t*[size + 1]) {
+    _data_8.reserve(size + 1);
+    _data_16.reserve(size + 1);
+    size_t pos = 0;
+
+    const auto append = [&](const char* val) {
+      size_t const len = ::strlen(val);
+      _data_8.emplace_back(val, val + len);
+      _data_16.emplace_back(val, val + len);
+      argv_8[pos] = _data_8.back().data();
+      argv_16[pos] = _data_16.back().data();
+      ++pos;
+    };
+
+    append("GECKOAPP.COM");  // argv[0] may be anything
+    for (const char* item : container) {
+      append(item);
+    }
+    assert(pos == size);
+
+    // C99 §5.1.2.2.1 states "argv[argc] shall be a null pointer", and
+    // `CheckArg` implicitly relies on this.
+    argv_8[pos] = nullptr;
+    argv_16[pos] = nullptr;
+  }
+
+  // debug output
+  friend std::ostream& operator<<(std::ostream& o, CommandLine const& cl) {
+    for (const auto& item : cl._data_8) {
+      o << '"';
+      for (const char c : item) {
+        if (c == '"') {
+          o << "\\\"";
+        } else {
+          o << c;
+        }
+      }
+      o << "\", ";
+    }
+    return o;
+  }
+};
+
+template <>
+char const** CommandLine::argv<char>() const {
+  return argv_8;
+}
+template <>
+wchar_t const** CommandLine::argv<wchar_t>() const {
+  return argv_16;
+}
+
+enum TestCaseState : bool {
+  FAIL = false,
+  PASS = true,
+};
+constexpr TestCaseState operator!(TestCaseState s) {
+  return TestCaseState(!bool(s));
+}
+
+#ifdef XP_WIN
+constexpr static const TestCaseState WIN_ONLY = PASS;
+#else
+constexpr static const TestCaseState WIN_ONLY = FAIL;
+#endif
+
+using NarrowTestCase = std::pair<const char*, const char*>;
+constexpr std::pair<TestCaseState, NarrowTestCase> kStrMatches8[] = {
+    {PASS, {"", ""}},
+
+    {PASS, {"i", "i"}},
+    {PASS, {"i", "I"}},
+
+    {FAIL, {"", "i"}},
+    {FAIL, {"i", ""}},
+    {FAIL, {"i", "j"}},
+
+    {PASS, {"mozilla", "mozilla"}},
+    {PASS, {"mozilla", "Mozilla"}},
+    {PASS, {"mozilla", "MOZILLA"}},
+    {PASS, {"mozilla", "mOZILLA"}},
+    {PASS, {"mozilla", "mOZIlLa"}},
+    {PASS, {"mozilla", "MoZiLlA"}},
+
+    {FAIL, {"mozilla", ""}},
+    {FAIL, {"mozilla", "mozill"}},
+    {FAIL, {"mozilla", "mozillo"}},
+    {FAIL, {"mozilla", "mozillam"}},
+    {FAIL, {"mozilla", "mozilla-"}},
+    {FAIL, {"mozilla", "-mozilla"}},
+    {FAIL, {"-mozilla", "mozilla"}},
+
+    // numbers are permissible
+    {PASS, {"m0zi11a", "m0zi11a"}},
+    {PASS, {"m0zi11a", "M0ZI11A"}},
+    {PASS, {"m0zi11a", "m0Zi11A"}},
+
+    {FAIL, {"mozilla", "m0zi11a"}},
+    {FAIL, {"m0zi11a", "mozilla"}},
+
+    // capital letters are not accepted in the left comparand
+    {FAIL, {"I", "i"}},
+    {FAIL, {"I", "i"}},
+    {FAIL, {"Mozilla", "mozilla"}},
+    {FAIL, {"Mozilla", "Mozilla"}},
+
+    // punctuation other than `-` is rejected
+    {FAIL, {"*", "*"}},
+    {FAIL, {"*", "word"}},
+    {FAIL, {".", "."}},
+    {FAIL, {".", "a"}},
+    {FAIL, {"_", "_"}},
+
+    // spaces are rejected
+    {FAIL, {" ", " "}},
+    {FAIL, {"two words", "two words"}},
+
+    // non-ASCII characters are rejected
+    //
+    // (the contents of this test case may differ depending on the source and
+    // execution character sets, but the result should always be failure)
+    {FAIL, {"à", "a"}},
+    {FAIL, {"a", "à"}},
+    {FAIL, {"à", "à"}},
+};
+
+#ifdef XP_WIN
+using WideTestCase = std::pair<const char*, const wchar_t*>;
+std::pair<TestCaseState, WideTestCase> kStrMatches16[] = {
+    // (Turkish 'İ' may lowercase to 'i' in some locales, but
+    // we explicitly prevent that from being relevant)
+    {FAIL, {"i", L"İ"}},
+    {FAIL, {"mozilla", L"ṁozilla"}},
+};
+#endif
+
+constexpr const char* kRequiredArgs[] = {"aleph", "beth"};
+
+std::pair<TestCaseState, std::vector<const char*>> const kCommandLines[] = {
+    // the basic admissible forms
+    {PASS, {"-osint", "-aleph", "http://www.example.com/"}},
+    {PASS, {"-osint", "-beth", "http://www.example.com/"}},
+
+    // GNU-style double-dashes are also allowed
+    {PASS, {"--osint", "-aleph", "http://www.example.com/"}},
+    {PASS, {"--osint", "-beth", "http://www.example.com/"}},
+    {PASS, {"--osint", "--aleph", "http://www.example.com/"}},
+    {PASS, {"--osint", "--beth", "http://www.example.com/"}},
+
+    // on Windows, slashes are also permitted
+    {WIN_ONLY, {"-osint", "/aleph", "http://www.example.com/"}},
+    {WIN_ONLY, {"--osint", "/aleph", "http://www.example.com/"}},
+    // - These should pass on Windows because they're well-formed.
+    // - These should pass elsewhere because the first parameter is
+    //     just a local filesystem path, not an option.
+    {PASS, {"/osint", "/aleph", "http://www.example.com/"}},
+    {PASS, {"/osint", "-aleph", "http://www.example.com/"}},
+    {PASS, {"/osint", "--aleph", "http://www.example.com/"}},
+
+    // the required argument's argument may not itself be a flag
+    {FAIL, {"-osint", "-aleph", "-anything"}},
+    {FAIL, {"-osint", "-aleph", "--anything"}},
+    // - On Windows systems this is a switch and should be rejected.
+    // - On non-Windows systems this is potentially a valid local path.
+    {!WIN_ONLY, {"-osint", "-aleph", "/anything"}},
+
+    // wrong order
+    {FAIL, {"-osint", "http://www.example.com/", "-aleph"}},
+    {FAIL, {"-aleph", "-osint", "http://www.example.com/"}},
+    {FAIL, {"-aleph", "http://www.example.com/", "-osint"}},
+    {FAIL, {"http://www.example.com/", "-osint", "-aleph"}},
+    {FAIL, {"http://www.example.com/", "-aleph", "-osint"}},
+
+    // missing arguments
+    {FAIL, {"-osint", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph"}},
+    {FAIL, {"-osint"}},
+
+    // improper arguments
+    {FAIL, {"-osint", "-other-argument", "http://www.example.com/"}},
+    {FAIL, {"-osint", "", "http://www.example.com/"}},
+
+    // additional arguments
+    {FAIL, {"-osint", "-aleph", "http://www.example.com/", "-other-argument"}},
+    {FAIL, {"-osint", "-other-argument", "-aleph", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph", "-other-argument", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph", "http://www.example.com/", "-a", "-b"}},
+    {FAIL, {"-osint", "-aleph", "-a", "http://www.example.com/", "-b"}},
+    {FAIL, {"-osint", "-a", "-aleph", "http://www.example.com/", "-b"}},
+
+    // multiply-occurring otherwise-licit arguments
+    {FAIL, {"-osint", "-aleph", "-beth", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph", "-aleph", "http://www.example.com/"}},
+
+    // if -osint is not supplied, anything goes
+    {PASS, {}},
+    {PASS, {"http://www.example.com"}},
+    {PASS, {"-aleph", "http://www.example.com/"}},
+    {PASS, {"-beth", "http://www.example.com/"}},
+    {PASS, {"-aleph", "http://www.example.com/", "-other-argument"}},
+    {PASS, {"-aleph", "-aleph", "http://www.example.com/"}},
+};
+
+constexpr static char const* const kOptionalArgs[] = {"mozilla", "allizom"};
+
+// Additional test cases for optional parameters.
+//
+// Test cases marked PASS should pass iff the above optional parameters are
+// permitted. (Test cases marked FAIL should fail regardless, and are only
+// grouped here for convenience and semantic coherence.)
+std::pair<TestCaseState, std::vector<const char*>> kCommandLinesOpt[] = {
+    // one permitted optional argument
+    {PASS, {"-osint", "-mozilla", "-aleph", "http://www.example.com/"}},
+    {PASS, {"-osint", "-allizom", "-aleph", "http://www.example.com/"}},
+
+    // multiple permitted optional arguments
+    {PASS,
+     {"-osint", "-mozilla", "-allizom", "-aleph", "http://www.example.com/"}},
+    {PASS,
+     {"-osint", "-allizom", "-mozilla", "-aleph", "http://www.example.com/"}},
+
+    // optional arguments in the wrong place
+    {FAIL, {"-mozilla", "-osint", "-aleph", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph", "-mozilla", "http://www.example.com/"}},
+    {FAIL, {"-osint", "-aleph", "http://www.example.com/", "-mozilla"}},
+
+    // optional arguments in both right and wrong places
+    {FAIL,
+     {"-mozilla", "-osint", "-allizom", "-aleph", "http://www.example.com/"}},
+    {FAIL,
+     {"-osint", "-allizom", "-aleph", "-mozilla", "http://www.example.com/"}},
+    {FAIL,
+     {"-osint", "-allizom", "-aleph", "http://www.example.com/", "-mozilla"}},
+};
+
+enum WithOptionalState : bool {
+  NoOptionalArgs = false,
+  WithOptionalArgs = true,
+};
+
+template <typename CharT>
+bool TestCommandLineImpl(CommandLine const& cl,
+                         WithOptionalState withOptional) {
+  int argc = cl.argc();
+  // EnsureCommandlineSafe's signature isn't const-correct here for annoying
+  // reasons, but it is indeed non-mutating.
+  CharT** argv = const_cast<CharT**>(cl.argv<CharT>());
+  if (withOptional) {
+    return mozilla::internal::EnsureCommandlineSafeImpl(
+        argc, argv, kRequiredArgs, kOptionalArgs);
+  }
+  return mozilla::internal::EnsureCommandlineSafeImpl(argc, argv,
+                                                      kRequiredArgs);
+}
+
+// Test that `args` produces `expectation`. On Windows, test against both
+// wide-character and narrow-character implementations.
+void TestCommandLine(TestCaseState expectation, CommandLine const& cl,
+                     WithOptionalState withOptional) {
+  EXPECT_EQ(TestCommandLineImpl<char>(cl, withOptional), expectation)
+      << "cl is: " << cl << std::endl
+      << "withOptional is: " << bool(withOptional);
+#ifdef XP_WIN
+  EXPECT_EQ(TestCommandLineImpl<wchar_t>(cl, withOptional), expectation)
+      << "cl is: " << cl << std::endl
+      << "withOptional is: " << bool(withOptional);
+#endif
+}
+}  // namespace testzilla
+
+/***********************
+ * Test cases
+ */
+
+TEST(CmdLineAndEnvUtils, strimatch)
+{
+  using namespace testzilla;
+  using mozilla::strimatch;
+  for (auto const& [result, data] : kStrMatches8) {
+    auto const& [left, right] = data;
+    EXPECT_EQ(strimatch(left, right), result)
+        << '<' << left << "> !~ <" << right << '>';
+
+#ifdef XP_WIN
+    wchar_t right_wide[200];
+    ::mbstowcs(right_wide, right, 200);
+    EXPECT_EQ(strimatch(left, right_wide), result)
+        << '<' << left << "> !~ L<" << right << '>';
+#endif
+  }
+
+#ifdef XP_WIN
+  for (auto const& [result, data] : kStrMatches16) {
+    auto const& [left, right] = data;
+    EXPECT_EQ(strimatch(left, right), result)
+        << '<' << left << "> !~ L<" << right << '>';
+  }
+#endif
+}
+
+TEST(CmdLineAndEnvUtils, ensureSafe)
+{
+  using namespace testzilla;
+  for (auto const& [result, data] : kCommandLines) {
+    CommandLine const cl(data);
+    TestCommandLine(result, cl, NoOptionalArgs);
+  }
+  for (auto const& [_unused, data] : kCommandLinesOpt) {
+    MOZ_UNUSED(_unused);  // silence gcc
+    CommandLine const cl(data);
+    TestCommandLine(FAIL, cl, NoOptionalArgs);
+  }
+}
+
+TEST(CmdLineAndEnvUtils, ensureSafeWithOptional)
+{
+  using namespace testzilla;
+  for (auto const& [result, data] : kCommandLines) {
+    CommandLine const cl(data);
+    TestCommandLine(result, cl, WithOptionalArgs);
+  }
+  for (auto const& [result, data] : kCommandLinesOpt) {
+    CommandLine const cl(data);
+    TestCommandLine(result, cl, WithOptionalArgs);
+  }
+}
diff --git a/toolkit/xre/test/gtest/TestCompatVersionCompare.cpp b/toolkit/xre/test/gtest/TestCompatVersionCompare.cpp
new file mode 100644
index 0000000000..bce64aacd5
--- /dev/null
+++ b/toolkit/xre/test/gtest/TestCompatVersionCompare.cpp
@@ -0,0 +1,53 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+#include "gtest/gtest.h"
+#include "nsAppRunner.h"
+#include "nsString.h"
+
+void CheckCompatVersionCompare(const nsCString& aOldCompatVersion,
+                               const nsCString& aNewCompatVersion,
+                               bool aExpectedSame, bool aExpectedDowngrade) {
+  printf("Comparing '%s' to '%s'.\n", aOldCompatVersion.get(),
+         aNewCompatVersion.get());
+
+  int32_t result = CompareCompatVersions(aOldCompatVersion, aNewCompatVersion);
+
+  ASSERT_EQ(aExpectedSame, result == 0)
+      << "Version sameness check should match.";
+  ASSERT_EQ(aExpectedDowngrade, result > 0)
+      << "Version downgrade check should match.";
+}
+
+void CheckExpectedResult(const char* aOldAppVersion, const char* aNewAppVersion,
+                         bool aExpectedSame, bool aExpectedDowngrade) {
+  nsCString oldCompatVersion;
+  BuildCompatVersion(aOldAppVersion, "", "", oldCompatVersion);
+
+  nsCString newCompatVersion;
+  BuildCompatVersion(aNewAppVersion, "", "", newCompatVersion);
+
+  CheckCompatVersionCompare(oldCompatVersion, newCompatVersion, aExpectedSame,
+                            aExpectedDowngrade);
+}
+
+TEST(CompatVersionCompare, CompareVersionChange)
+{
+  // Identical
+  CheckExpectedResult("67.0", "67.0", true, false);
+
+  // Version changes
+  CheckExpectedResult("67.0", "68.0", false, false);
+  CheckExpectedResult("68.0", "67.0", false, true);
+  CheckExpectedResult("67.0", "67.0.1", true, false);
+  CheckExpectedResult("67.0.1", "67.0", true, false);
+  CheckExpectedResult("67.0.1", "67.0.1", true, false);
+  CheckExpectedResult("67.0.1", "67.0.2", true, false);
+  CheckExpectedResult("67.0.2", "67.0.1", true, false);
+
+  // Check that if the last run was safe mode then we consider this an upgrade.
+  CheckCompatVersionCompare(
+      "Safe Mode"_ns, "67.0.1_20000000000000/20000000000000"_ns, false, false);
+}
diff --git a/toolkit/xre/test/gtest/TestGeckoArgs.cpp b/toolkit/xre/test/gtest/TestGeckoArgs.cpp
new file mode 100644
index 0000000000..42c7a41b2b
--- /dev/null
+++ b/toolkit/xre/test/gtest/TestGeckoArgs.cpp
@@ -0,0 +1,179 @@
+/* -*- 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 "gtest/gtest.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/GeckoArgs.h"
+
+using namespace mozilla;
+using namespace mozilla::geckoargs;
+
+static CommandLineArg<const char*> kCharParam{"-charParam", "charparam"};
+static CommandLineArg<uint64_t> kUint64Param{"-Uint64Param", "uint64param"};
+static CommandLineArg<bool> kFlag{"-Flag", "flag"};
+
+template <size_t N>
+bool CheckArgv(char** aArgv, const char* const (&aExpected)[N]) {
+  for (size_t i = 0; i < N; ++i) {
+    if (aArgv[i] == nullptr && aExpected[i] == nullptr) {
+      return true;
+    }
+    if (aArgv[i] == nullptr || aExpected[i] == nullptr) {
+      return false;
+    }
+    if (strcmp(aArgv[i], aExpected[i]) != 0) {
+      return false;
+    }
+  }
+  return true;
+}
+
+char kFirefox[] = "$HOME/bin/firefox/firefox-bin";
+
+TEST(GeckoArgs, const_char_ptr)
+{
+  char kCharParamStr[] = "-charParam";
+  char kCharParamValue[] = "paramValue";
+
+  {
+    char* argv[] = {kFirefox, kCharParamStr, kCharParamValue, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 4);
+
+    Maybe<const char*> charParam = kCharParam.Get(argc, argv);
+    EXPECT_TRUE(charParam.isSome());
+    EXPECT_EQ(*charParam, kCharParamValue);
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    char kBlahBlah[] = "-blahblah";
+    char* argv[] = {kFirefox, kCharParamStr, kBlahBlah, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 4);
+
+    Maybe<const char*> charParam = kCharParam.Get(argc, argv);
+    EXPECT_TRUE(charParam.isNothing());
+
+    const char* const expArgv[] = {kFirefox, kBlahBlah, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    std::vector<std::string> extraArgs;
+    EXPECT_EQ(extraArgs.size(), 0U);
+    kCharParam.Put("ParamValue", extraArgs);
+    EXPECT_EQ(extraArgs.size(), 2U);
+    EXPECT_EQ(extraArgs[0], "-charParam");
+    EXPECT_EQ(extraArgs[1], "ParamValue");
+  }
+  { EXPECT_EQ(kCharParam.Name(), "-charParam"); }
+}
+
+TEST(GeckoArgs, uint64)
+{
+  char kUint64ParamStr[] = "-Uint64Param";
+
+  {
+    char* argv[] = {kFirefox, kUint64ParamStr, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 3);
+
+    Maybe<uint64_t> uint64Param = kUint64Param.Get(argc, argv);
+    EXPECT_TRUE(uint64Param.isNothing());
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    char* argv[] = {kFirefox, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 2);
+
+    Maybe<uint64_t> uint64Param = kUint64Param.Get(argc, argv);
+    EXPECT_TRUE(uint64Param.isNothing());
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    char kUint64ParamValue[] = "42";
+    char* argv[] = {kFirefox, kUint64ParamStr, kUint64ParamValue, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 4);
+
+    Maybe<uint64_t> uint64Param = kUint64Param.Get(argc, argv);
+    EXPECT_TRUE(uint64Param.isSome());
+    EXPECT_EQ(*uint64Param, 42U);
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    char kUint64ParamValue[] = "aa";
+    char* argv[] = {kFirefox, kUint64ParamStr, kUint64ParamValue, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 4);
+
+    Maybe<uint64_t> uint64Param = kUint64Param.Get(argc, argv);
+    EXPECT_TRUE(uint64Param.isNothing());
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    std::vector<std::string> extraArgs;
+    EXPECT_EQ(extraArgs.size(), 0U);
+    kUint64Param.Put(1234, extraArgs);
+    EXPECT_EQ(extraArgs.size(), 2U);
+    EXPECT_EQ(extraArgs[0], "-Uint64Param");
+    EXPECT_EQ(extraArgs[1], "1234");
+  }
+  { EXPECT_EQ(kUint64Param.Name(), "-Uint64Param"); }
+}
+
+TEST(GeckoArgs, bool)
+{
+  char kFlagStr[] = "-Flag";
+
+  {
+    char* argv[] = {kFirefox, kFlagStr, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 3);
+
+    Maybe<bool> Flag = kFlag.Get(argc, argv);
+    EXPECT_TRUE(Flag.isSome());
+    EXPECT_TRUE(*Flag);
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    char* argv[] = {kFirefox, nullptr};
+    int argc = ArrayLength(argv);
+    EXPECT_EQ(argc, 2);
+
+    Maybe<bool> Flag = kFlag.Get(argc, argv);
+    EXPECT_TRUE(Flag.isNothing());
+
+    const char* const expArgv[] = {kFirefox, nullptr};
+    EXPECT_TRUE(CheckArgv(argv, expArgv));
+  }
+  {
+    std::vector<std::string> extraArgs;
+    EXPECT_EQ(extraArgs.size(), 0U);
+    kFlag.Put(true, extraArgs);
+    EXPECT_EQ(extraArgs.size(), 1U);
+    EXPECT_EQ(extraArgs[0], "-Flag");
+  }
+  {
+    std::vector<std::string> extraArgs;
+    EXPECT_EQ(extraArgs.size(), 0U);
+    kFlag.Put(false, extraArgs);
+    EXPECT_EQ(extraArgs.size(), 0U);
+  }
+  { EXPECT_EQ(kFlag.Name(), "-Flag"); }
+}
diff --git a/toolkit/xre/test/gtest/moz.build b/toolkit/xre/test/gtest/moz.build
new file mode 100644
index 0000000000..bec881fa72
--- /dev/null
+++ b/toolkit/xre/test/gtest/moz.build
@@ -0,0 +1,24 @@
+# -*- Mode: python; c-basic-offset: 4; 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/.
+
+Library("xretest")
+
+UNIFIED_SOURCES = [
+    "TestCmdLineAndEnvUtils.cpp",
+    "TestCompatVersionCompare.cpp",
+    "TestGeckoArgs.cpp",
+]
+
+LOCAL_INCLUDES += [
+    "/toolkit/components/remote",
+]
+
+if CONFIG["OS_TARGET"] == "WINNT":
+    UNIFIED_SOURCES += [
+        "TestAssembleCommandLineWin.cpp",
+    ]
+
+FINAL_LIBRARY = "xul-gtest"
diff --git a/toolkit/xre/test/marionette/gen_win32k_tests.py b/toolkit/xre/test/marionette/gen_win32k_tests.py
new file mode 100644
index 0000000000..e0a39776db
--- /dev/null
+++ b/toolkit/xre/test/marionette/gen_win32k_tests.py
@@ -0,0 +1,212 @@
+#!/usr/bin/env python3
+
+import re
+
+RE_DEFAULT = re.compile(r"\[D=([TF])\] ")
+RE_TRANSITION = re.compile(r"([a-zA-Z0-9 \[\]=#_-]+) *->(.*)")
+RE_ASSERTION = re.compile(
+    r"\[A S=([a-zA-Z01_]+) SS=([a-zA-Z01_]+) ES=([a-zA-Z01_]+) P=([a-zA-Z_]+) ESP=([a-zA-Z_]+)\]"
+)
+RE_ASSERTION_SHORTHAND = re.compile(r"\[A#([0-9T]+)\]")
+
+# ======================================================================
+# ======================================================================
+
+testnum = 1
+
+
+def start_test(line):
+    global testnum
+    output.write(
+        """
+    def test_{0}(self):
+        # {1}...\n""".format(
+            testnum, line[0:80]
+        )
+    )
+    testnum += 1
+
+
+def set_default(d):
+    output.write(
+        """
+        if self.default_is is not {0}:
+            return\n""".format(
+            "True" if d == "T" else "False"
+        )
+    )
+
+
+def enroll(e):
+    if e.endswith("-C"):
+        e = e[:-2]
+        output.write("\n        # Re-set enrollment pref, like Normandy would do\n")
+    output.write(
+        "        self.set_enrollment_status(ExperimentStatus.ENROLLED_{0})\n".format(
+            e.upper()
+        )
+    )
+
+
+def set_pref(enabled):
+    output.write(
+        "\n        self.marionette.set_pref(Prefs.WIN32K, {0})\n".format(str(enabled))
+    )
+
+
+def set_e10s(enable):
+    if enable:
+        output.write(
+            """
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")\n"""
+        )
+    else:
+        raise Exception("Not implemented")
+
+
+def set_header(enable):
+    if enable:
+        output.write(
+            """
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})\n"""
+        )
+    else:
+        output.write(
+            """
+        self.set_env(ENV_DISABLE_WIN32K, "")\n"""
+        )
+
+
+def set_bad_requirements(enabled):
+    output.write(
+        """
+        self.marionette.set_pref(Prefs.WEBGL, {0})\n""".format(
+            "False" if enabled else "True"
+        )
+    )
+
+
+def restart():
+    output.write("\n        self.restart()\n")
+
+
+def print_assertion(assertion):
+    if not assertion:
+        return
+    output.write(
+        """
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.{0},
+            sessionStatus=ContentWin32kLockdownState.{1},
+            experimentStatus=ExperimentStatus.{2},
+            pref={3},
+            enrollmentStatusPref=ExperimentStatus.{4},
+        )\n""".format(
+            *assertion
+        )
+    )
+
+
+# ======================================================================
+# ======================================================================
+
+TESTS = open("win32k_tests.txt", "r").readlines()
+
+output = open("test_win32k_enrollment.py", "w", newline="\n")
+header = open("test_win32k_enrollment.template.py", "r")
+for l in header:
+    output.write(l)
+
+mappings = {}
+for line in TESTS:
+    line = line.strip()
+    if not line:
+        continue
+
+    if line.startswith("#"):
+        continue
+    elif line.startswith("> "):
+        line = line[2:]
+        key, value = line.split(":")
+        mappings[key.strip()] = value.strip()
+        continue
+    elif line.startswith("-"):
+        line = line[1:].strip()
+    elif line.startswith("+"):
+        line = line[1:].strip()
+        import pdb
+
+        pdb.set_trace()
+    else:
+        raise Exception("unknown line type: " + line)
+
+    # We can't handle Safe Mode right now
+    if "Safe Mode" in line:
+        continue
+
+    # If we have no assertions defined, skip the test entirely
+    if "[A" not in line:
+        continue
+
+    if not RE_DEFAULT.match(line):
+        raise Exception("'{0}' does not match the default regex".format(line))
+    default = RE_DEFAULT.search(line).groups(1)[0]
+
+    start_test(line)
+
+    set_default(default)
+
+    line = line[6:]
+
+    while line:
+        # this is a horrible hack for the line ending to avoid making the
+        # regex more complicated and having to fix it
+        if not line.endswith(" ->"):
+            line += " ->"
+
+        groups = RE_TRANSITION.search(line).groups()
+        start = groups[0].strip()
+        end = groups[1].strip()
+
+        if RE_ASSERTION.search(start):
+            assertion = RE_ASSERTION.search(start).groups()
+            start = start[0 : start.index("[")].strip()
+        elif RE_ASSERTION_SHORTHAND.search(start):
+            key = RE_ASSERTION_SHORTHAND.search(start).groups()[0]
+            assertion = RE_ASSERTION.search(mappings[key]).groups()
+            start = start[0 : start.index("[")].strip()
+        else:
+            assertion = ""
+
+        if start == "Nothing":
+            pass
+        elif start.startswith("Enrolled "):
+            enroll(start[9:])
+        elif start == "E10S":
+            set_e10s(True)
+        elif start == "Header-On":
+            set_header(True)
+        elif start == "Header-Off":
+            set_header(False)
+        elif start == "Bad Requirements":
+            set_bad_requirements(True)
+        elif start == "Restart":
+            restart()
+        elif start == "On":
+            set_pref(True)
+        elif start == "Off":
+            set_pref(False)
+        else:
+            raise Exception("Unknown Action: " + start)
+
+        print_assertion(assertion)
+
+        line = end.strip()
+
+    if RE_ASSERTION.match(line):
+        print_assertion(RE_ASSERTION.search(line).groups())
+    elif RE_ASSERTION_SHORTHAND.search(line):
+        key = RE_ASSERTION_SHORTHAND.search(line).groups()[0]
+        print_assertion(RE_ASSERTION.search(mappings[key]).groups())
diff --git a/toolkit/xre/test/marionette/marionette.toml b/toolkit/xre/test/marionette/marionette.toml
new file mode 100644
index 0000000000..b031d2e1e4
--- /dev/null
+++ b/toolkit/xre/test/marionette/marionette.toml
@@ -0,0 +1,9 @@
+[DEFAULT]
+
+["test_exitcode.py"]
+
+["test_fission_autostart.py"]
+
+["test_win32k_enrollment.py"]
+run-if = ["os == 'win'"]
+skip-if = ["ccov"] # Bug 1757102
diff --git a/toolkit/xre/test/marionette/test_exitcode.py b/toolkit/xre/test/marionette/test_exitcode.py
new file mode 100644
index 0000000000..4ce7306122
--- /dev/null
+++ b/toolkit/xre/test/marionette/test_exitcode.py
@@ -0,0 +1,31 @@
+from marionette_harness import MarionetteTestCase
+
+
+class TestFissionAutostart(MarionetteTestCase):
+    def test_normal_exit(self):
+        self.marionette.set_context(self.marionette.CONTEXT_CHROME)
+
+        def call_quit():
+            self.marionette.execute_script(
+                """
+                Services.startup.quit(Ci.nsIAppStartup.eAttemptQuit);
+                """,
+                sandbox="system",
+            )
+
+        self.marionette.quit(callback=call_quit)
+        self.assertEqual(self.marionette.instance.runner.returncode, 0)
+
+    def test_exit_code(self):
+        self.marionette.set_context(self.marionette.CONTEXT_CHROME)
+
+        def call_quit():
+            self.marionette.execute_script(
+                """
+                Services.startup.quit(Ci.nsIAppStartup.eAttemptQuit, 5);
+                """,
+                sandbox="system",
+            )
+
+        self.marionette.quit(callback=call_quit)
+        self.assertEqual(self.marionette.instance.runner.returncode, 5)
diff --git a/toolkit/xre/test/marionette/test_fission_autostart.py b/toolkit/xre/test/marionette/test_fission_autostart.py
new file mode 100644
index 0000000000..e34087aca9
--- /dev/null
+++ b/toolkit/xre/test/marionette/test_fission_autostart.py
@@ -0,0 +1,247 @@
+from contextlib import contextmanager
+
+from marionette_harness import MarionetteTestCase
+
+
+class ExperimentStatus:
+    UNENROLLED = 0
+    ENROLLED_CONTROL = 1
+    ENROLLED_TREATMENT = 2
+    DISQUALIFIED = 3
+
+
+class Prefs:
+    FISSION_AUTOSTART = "fission.autostart"
+    FISSION_AUTOSTART_SESSION = "fission.autostart.session"
+
+
+ENV_ENABLE_FISSION = "MOZ_FORCE_ENABLE_FISSION"
+ENV_DISABLE_FISSION = "MOZ_FORCE_DISABLE_FISSION"
+ENV_DISABLE_E10S = "MOZ_FORCE_DISABLE_E10S"
+
+
+DECISION_STATUS = {
+    "experimentControl": 1,
+    "experimentTreatment": 2,
+    "disabledByE10sEnv": 3,
+    "enabledByEnv": 4,
+    "disabledByEnv": 5,
+    "enabledByDefault": 7,
+    "disabledByDefault": 8,
+    "enabledByUserPref": 9,
+    "disabledByUserPref": 10,
+    "disabledByE10sOther": 11,
+}
+
+
+class TestFissionAutostart(MarionetteTestCase):
+    SANDBOX_NAME = "fission-autostart"
+
+    def execute_script(self, code, *args, **kwargs):
+        with self.marionette.using_context(self.marionette.CONTEXT_CHROME):
+            return self.marionette.execute_script(
+                code, new_sandbox=False, sandbox=self.SANDBOX_NAME, *args, **kwargs
+            )
+
+    def get_fission_status(self):
+        return self.execute_script(
+            r"""
+          let win = Services.wm.getMostRecentWindow("navigator:browser");
+          return {
+            fissionAutostart: Services.appinfo.fissionAutostart,
+            decisionStatus: Services.appinfo.fissionDecisionStatus,
+            decisionStatusString: Services.appinfo.fissionDecisionStatusString,
+            useRemoteSubframes: win.docShell.nsILoadContext.useRemoteSubframes,
+            fissionAutostartSession: Services.prefs.getBoolPref("fission.autostart.session"),
+            dynamicFissionAutostart: Services.prefs.getBoolPref("fission.autostart"),
+          };
+        """
+        )
+
+    def check_fission_status(self, enabled, decision, dynamic=None):
+        if dynamic is None:
+            dynamic = enabled
+
+        expected = {
+            "fissionAutostart": enabled,
+            "decisionStatus": DECISION_STATUS[decision],
+            "decisionStatusString": decision,
+            "useRemoteSubframes": enabled,
+            "fissionAutostartSession": enabled,
+            "dynamicFissionAutostart": dynamic,
+        }
+
+        status = self.get_fission_status()
+
+        for prop, value in expected.items():
+            self.assertEqual(
+                status[prop],
+                value,
+                "%s should have the value `%r`, but has `%r`"
+                % (prop, value, status[prop]),
+            )
+
+    def set_env(self, env, value):
+        self.execute_script(
+            "env.set(arguments[0], arguments[1]);", script_args=(env, value)
+        )
+
+    def get_env(self, env):
+        return self.execute_script("return env.get(arguments[0]);", script_args=(env,))
+
+    def restart(self, prefs=None, env=None):
+        if prefs:
+            self.marionette.set_prefs(prefs)
+
+        if env:
+            for name, value in env.items():
+                self.set_env(name, value)
+
+        self.marionette.restart(in_app=True, clean=False)
+        self.setUpSession()
+
+        # Sanity check our environment.
+        if prefs:
+            for key, val in prefs.items():
+                if val is not None:
+                    self.assertEqual(self.marionette.get_pref(key), val)
+        if env:
+            for key, val in env.items():
+                self.assertEqual(self.get_env(key), val or "")
+
+    def setUpSession(self):
+        self.marionette.set_context(self.marionette.CONTEXT_CHROME)
+
+        self.execute_script(
+            r"""
+          // We're running in a function, in a sandbox, that inherits from an
+          // X-ray wrapped window. Anything we want to be globally available
+          // needs to be defined on that window.
+          window.env = Services.env;
+        """
+        )
+
+    @contextmanager
+    def full_restart(self):
+        profile = self.marionette.instance.profile
+        try:
+            self.marionette.quit()
+            yield profile
+        finally:
+            self.marionette.start_session()
+            self.setUpSession()
+
+    def setUp(self):
+        super(TestFissionAutostart, self).setUp()
+
+        # If we have configured marionette to require a particular value for
+        # `fission.autostart`, remove it as a forced pref until `tearDown`, and
+        # perform a clean restart, so we run this test without the pref
+        # pre-configured.
+        self.fissionRequired = None
+        if Prefs.FISSION_AUTOSTART in self.marionette.instance.required_prefs:
+            self.fissionRequired = self.marionette.instance.required_prefs[
+                Prefs.FISSION_AUTOSTART
+            ]
+            del self.marionette.instance.required_prefs[Prefs.FISSION_AUTOSTART]
+            self.marionette.restart(in_app=False, clean=True)
+
+        self.setUpSession()
+
+        # Fission status must start out with `enabledByDefault`
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByDefault",
+        )
+
+    def tearDown(self):
+        if self.fissionRequired is not None:
+            self.marionette.instance.required_prefs[
+                Prefs.FISSION_AUTOSTART
+            ] = self.fissionRequired
+        self.marionette.restart(in_app=False, clean=True)
+
+        super(TestFissionAutostart, self).tearDown()
+
+    def test_runtime_changes(self):
+        """Tests that changes to preferences during runtime do not have any
+        effect on the current session."""
+
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByDefault",
+        )
+
+        self.restart(prefs={Prefs.FISSION_AUTOSTART: False})
+
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByUserPref",
+        )
+
+        self.marionette.set_pref(Prefs.FISSION_AUTOSTART, True)
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByUserPref",
+            dynamic=True,
+        )
+
+        self.marionette.clear_pref(Prefs.FISSION_AUTOSTART)
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByUserPref",
+            dynamic=True,
+        )
+
+        self.restart()
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByDefault",
+        )
+
+    def test_fission_precedence(self):
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByDefault",
+        )
+
+        self.restart(
+            prefs={Prefs.FISSION_AUTOSTART: False}, env={ENV_ENABLE_FISSION: "1"}
+        )
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByEnv",
+            dynamic=False,
+        )
+
+        self.restart(
+            prefs={Prefs.FISSION_AUTOSTART: True},
+            env={ENV_DISABLE_FISSION: "1", ENV_ENABLE_FISSION: ""},
+        )
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByEnv",
+            dynamic=True,
+        )
+
+        self.restart(
+            prefs={Prefs.FISSION_AUTOSTART: False}, env={ENV_DISABLE_FISSION: ""}
+        )
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByUserPref",
+        )
+
+        self.restart(prefs={Prefs.FISSION_AUTOSTART: None})
+        self.check_fission_status(
+            enabled=True,
+            decision="enabledByDefault",
+        )
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.check_fission_status(
+            enabled=False,
+            decision="disabledByE10sEnv",
+            dynamic=True,
+        )
diff --git a/toolkit/xre/test/marionette/test_win32k_enrollment.py b/toolkit/xre/test/marionette/test_win32k_enrollment.py
new file mode 100644
index 0000000000..d09331319b
--- /dev/null
+++ b/toolkit/xre/test/marionette/test_win32k_enrollment.py
@@ -0,0 +1,2506 @@
+from contextlib import contextmanager
+
+from marionette_harness import MarionetteTestCase
+
+
+class ExperimentStatus:
+    UNENROLLED = 0
+    ENROLLED_CONTROL = 1
+    ENROLLED_TREATMENT = 2
+    DISQUALIFIED = 3
+
+
+class ContentWin32kLockdownState:
+    LockdownEnabled = 1
+    MissingWebRender = 2
+    OperatingSystemNotSupported = 3
+    PrefNotSet = 4
+    MissingRemoteWebGL = 5
+    MissingNonNativeTheming = 6
+    DisabledByEnvVar = 7
+    DisabledBySafeMode = 8
+    DisabledByE10S = 9
+    DisabledByUserPref = 10
+    EnabledByUserPref = 11
+    DisabledByControlGroup = 12
+    EnabledByTreatmentGroup = 13
+    DisabledByDefault = 14
+    EnabledByDefault = 15
+
+
+class Prefs:
+    ENROLLMENT_STATUS = "security.sandbox.content.win32k-experiment.enrollmentStatus"
+    STARTUP_ENROLLMENT_STATUS = (
+        "security.sandbox.content.win32k-experiment.startupEnrollmentStatus"
+    )
+    WIN32K = "security.sandbox.content.win32k-disable"
+    WEBGL = "webgl.out-of-process"
+
+
+ENV_DISABLE_WIN32K = "MOZ_ENABLE_WIN32K"
+ENV_DISABLE_E10S = "MOZ_FORCE_DISABLE_E10S"
+
+
+class TestWin32kAutostart(MarionetteTestCase):
+    SANDBOX_NAME = "win32k-autostart"
+
+    def execute_script(self, code, *args, **kwargs):
+        with self.marionette.using_context(self.marionette.CONTEXT_CHROME):
+            return self.marionette.execute_script(
+                code, new_sandbox=False, sandbox=self.SANDBOX_NAME, *args, **kwargs
+            )
+
+    def get_win32k_status(self):
+        return self.execute_script(
+            r"""
+          let win = Services.wm.getMostRecentWindow("navigator:browser");
+          let ses = "security.sandbox.content.win32k-experiment.startupEnrollmentStatus";
+          return {
+            win32kSessionStatus: Services.appinfo.win32kSessionStatus,
+            win32kStatus: Services.appinfo.win32kLiveStatusTestingOnly,
+            win32kExperimentStatus: Services.appinfo.win32kExperimentStatus,
+            win32kPref: Services.prefs.getBoolPref("security.sandbox.content.win32k-disable"),
+            win32kStartupEnrollmentStatusPref: Services.prefs.getIntPref(ses),
+          };
+        """
+        )
+
+    def check_win32k_status(
+        self, status, sessionStatus, experimentStatus, pref, enrollmentStatusPref
+    ):
+        # We CANNOT check win32kEnrollmentStatusPref after a restart because we only set this
+        # pref on the default branch, and it goes away after a restart, so we only check
+        # the startupEnrollmentStatusPref
+        expected = {
+            "win32kSessionStatus": sessionStatus,
+            "win32kStatus": status,
+            "win32kExperimentStatus": experimentStatus,
+            "win32kPref": pref,
+            "win32kStartupEnrollmentStatusPref": enrollmentStatusPref,
+        }
+
+        status = self.get_win32k_status()
+
+        for prop, value in expected.items():
+            self.assertEqual(
+                status[prop],
+                value,
+                "%s should have the value `%r`, but has `%r`"
+                % (prop, value, status[prop]),
+            )
+
+    def set_env(self, env, value):
+        self.execute_script(
+            "env.set(arguments[0], arguments[1]);", script_args=(env, value)
+        )
+
+    def get_env(self, env):
+        return self.execute_script("return env.get(arguments[0]);", script_args=(env,))
+
+    def set_enrollment_status(self, status):
+        self.marionette.set_pref(Prefs.ENROLLMENT_STATUS, status, default_branch=True)
+
+        updated_status = self.marionette.get_pref(Prefs.ENROLLMENT_STATUS)
+        self.assertTrue(
+            status == updated_status or updated_status == ExperimentStatus.DISQUALIFIED
+        )
+        startup_status = self.marionette.get_pref(Prefs.STARTUP_ENROLLMENT_STATUS)
+        self.assertEqual(
+            startup_status,
+            updated_status,
+            "Startup enrollment status (%r) should match "
+            "session status (%r)" % (startup_status, updated_status),
+        )
+
+    def restart(self, prefs=None, env=None):
+        if prefs:
+            self.marionette.set_prefs(prefs)
+
+        if env:
+            for name, value in env.items():
+                self.set_env(name, value)
+
+        self.marionette.restart(in_app=True, clean=False)
+        self.setUpSession()
+
+        # Sanity check our environment.
+        if prefs:
+            for key, val in prefs.items():
+                if val is not None:
+                    self.assertEqual(self.marionette.get_pref(key), val)
+        if env:
+            for key, val in env.items():
+                self.assertEqual(self.get_env(key), val or "")
+
+    def setUpSession(self):
+        self.marionette.set_context(self.marionette.CONTEXT_CHROME)
+
+        self.execute_script(
+            r"""
+          // We're running in a function, in a sandbox, that inherits from an
+          // X-ray wrapped window. Anything we want to be globally available
+          // needs to be defined on that window.
+          window.env = Services.env;
+        """
+        )
+
+    @contextmanager
+    def full_restart(self):
+        profile = self.marionette.instance.profile
+        try:
+            self.marionette.quit()
+            yield profile
+        finally:
+            self.marionette.start_session()
+            self.setUpSession()
+
+    def setUp(self):
+        super(TestWin32kAutostart, self).setUp()
+
+        # If we have configured marionette to require a particular value for
+        # `win32k.autostart`, remove it as a forced pref until `tearDown`, and
+        # perform a clean restart, so we run this test without the pref
+        # pre-configured.
+        self.win32kRequired = None
+        if Prefs.WIN32K in self.marionette.instance.required_prefs:
+            self.win32kRequired = self.marionette.instance.required_prefs[Prefs.WIN32K]
+            del self.marionette.instance.required_prefs[Prefs.WIN32K]
+            self.marionette.restart(in_app=False, clean=True)
+
+        self.setUpSession()
+
+        # Marionette doesn't let you set preferences on the default branch before startup
+        # so we can't test the default=False and default=True scenarios in one test
+        # What we can do is generate all the tests, and then only run the runs for which
+        # the default is.  (And run the other ones locally to make sure they work before
+        # we land it.)
+        prefJS = 'return Services.prefs.getBoolPref("security.sandbox.content.win32k-disable");'
+        self.default_is = self.execute_script(prefJS)
+
+        if self.default_is is False:
+            # Win32k status must start out with `disabledByDefault`
+            self.check_win32k_status(
+                status=ContentWin32kLockdownState.DisabledByDefault,
+                sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+                experimentStatus=ExperimentStatus.UNENROLLED,
+                pref=False,
+                enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+            )
+        else:
+            # Win32k status must start out with `enabledByDefault`
+            self.check_win32k_status(
+                status=ContentWin32kLockdownState.EnabledByDefault,
+                sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+                experimentStatus=ExperimentStatus.UNENROLLED,
+                pref=True,
+                enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+            )
+
+    def tearDown(self):
+        if self.win32kRequired is not None:
+            self.marionette.instance.required_prefs[Prefs.WIN32K] = self.win32kRequired
+        self.marionette.restart(in_app=False, clean=True)
+
+        super(TestWin32kAutostart, self).tearDown()
+
+    def test_1(self):
+        # [D=F] Nothing [A#1] -> Enrolled Control [A S=DisabledByDefault SS=DisabledByDefa...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_2(self):
+        # [D=F] Nothing [A#1] -> Enrolled Treatment [A S=DisabledByDefault SS=DisabledByDe...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_3(self):
+        # [D=F] Nothing [A#1] -> On [A S=EnabledByUserPref SS=DisabledByDefault ES=UNENROL...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_4(self):
+        # [D=F] Nothing [A#1] -> Off [A#1] -> Restart [A#1]...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_5(self):
+        # [D=F] Nothing [A#1] -> On -> Bad Requirements [A S=MissingRemoteWebGL SS=Disable...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_6(self):
+        # [D=F] Nothing [A#1] -> On -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNENR...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_7(self):
+        # [D=F] Nothing [A#1] -> On -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar...
+
+        if self.default_is is not False:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_8(self):
+        # [D=T] Nothing [A#1T] -> Enrolled Control [A S=EnabledByDefault SS=EnabledByDefau...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_9(self):
+        # [D=T] Nothing [A#1T] -> Enrolled Treatment [A S=EnabledByDefault SS=EnabledByDef...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_10(self):
+        # [D=T] Nothing [A#1T] -> On [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLL...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_11(self):
+        # [D=T] Nothing [A#1T] -> Off [A S=DisabledByUserPref SS=EnabledByDefault ES=UNENR...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_12(self):
+        # [D=T] Nothing [A#1T] -> On -> Bad Requirements [A S=MissingRemoteWebGL SS=Enable...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_13(self):
+        # [D=T] Nothing [A#1T] -> On -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNEN...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_14(self):
+        # [D=T] Nothing [A#1T] -> On -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVa...
+
+        if self.default_is is not True:
+            return
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_15(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> Enrolled Control [A S=EnabledByUserPref SS=En...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_16(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> Enrolled Treatment [A S=EnabledByUserPref SS=...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_17(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> Off [A S=DisabledByDefault SS=EnabledByUserPr...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_18(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> Bad Requirements [A S=MissingRemoteWebGL SS=E...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_19(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_20(self):
+        # [D=F] On [A#3] -> Restart [A#4] -> Header-On [A S=DisabledByEnvVar SS=DisabledBy...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_21(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> Enrolled Control [A S=EnabledByDefault SS=E...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_22(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> Enrolled Treatment [A S=EnabledByDefault SS...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_23(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> Off [A S=DisabledByUserPref SS=EnabledByDef...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByUserPref,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_24(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> Bad Requirements [A S=MissingRemoteWebGL SS...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_25(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> E10S [A S=DisabledByE10S SS=DisabledByE10S ...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_26(self):
+        # [D=T] On [A#3T] -> Restart [A#4T] -> Header-On [A S=DisabledByEnvVar SS=Disabled...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_27(self):
+        # [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> On [A S=E...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_28(self):
+        # [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Off [A#6]...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_29(self):
+        # [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> Bad Requi...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_30(self):
+        # [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> E10S [A S...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_31(self):
+        # [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> Header-On...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_32(self):
+        # [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> On [A S...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_33(self):
+        # [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Off [A S=DisabledByUserPref S...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_34(self):
+        # [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> Bad Req...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_35(self):
+        # [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> E10S [A...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_36(self):
+        # [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> Header-...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByControlGroup,
+            sessionStatus=ContentWin32kLockdownState.DisabledByControlGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_CONTROL,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+    def test_37(self):
+        # [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> On [A...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByUserPref,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_38(self):
+        # [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Off [...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_39(self):
+        # [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Bad R...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_40(self):
+        # [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> E10S ...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_41(self):
+        # [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Heade...
+
+        if self.default_is is not False:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_42(self):
+        # [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> On ...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_43(self):
+        # [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Off...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByUserPref,
+            sessionStatus=ContentWin32kLockdownState.DisabledByUserPref,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_44(self):
+        # [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Bad...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_45(self):
+        # [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> E10...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        app_version = self.execute_script("return Services.appinfo.version")
+        self.restart(env={ENV_DISABLE_E10S: app_version})
+        self.set_env(ENV_DISABLE_E10S, "null")
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByE10S,
+            sessionStatus=ContentWin32kLockdownState.DisabledByE10S,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_46(self):
+        # [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Hea...
+
+        if self.default_is is not True:
+            return
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByDefault,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart(env={ENV_DISABLE_WIN32K: "1"})
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.DisabledByEnvVar,
+            sessionStatus=ContentWin32kLockdownState.DisabledByEnvVar,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.set_env(ENV_DISABLE_WIN32K, "")
+
+        # Re-set enrollment pref, like Normandy would do
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            sessionStatus=ContentWin32kLockdownState.EnabledByTreatmentGroup,
+            experimentStatus=ExperimentStatus.ENROLLED_TREATMENT,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+    def test_47(self):
+        # [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Enrolled Control [A S=MissingR...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_48(self):
+        # [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Enrolled Treatment [A S=Missin...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_49(self):
+        # [D=F] Bad Requirements [A#9] -> Restart [A#10] -> On [A S=MissingRemoteWebGL SS=...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_50(self):
+        # [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Off [A S=MissingRemoteWebGL SS...
+
+        if self.default_is is not False:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_51(self):
+        # [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Enrolled Control [A S=Missin...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_CONTROL)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_CONTROL,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_52(self):
+        # [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Enrolled Treatment [A S=Miss...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+        self.set_enrollment_status(ExperimentStatus.ENROLLED_TREATMENT)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.ENROLLED_TREATMENT,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.DISQUALIFIED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.DISQUALIFIED,
+        )
+
+    def test_53(self):
+        # [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> On [A S=MissingRemoteWebGL S...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, True)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+    def test_54(self):
+        # [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Off [A S=MissingRemoteWebGL ...
+
+        if self.default_is is not True:
+            return
+
+        self.marionette.set_pref(Prefs.WEBGL, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.restart()
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=True,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
+
+        self.marionette.set_pref(Prefs.WIN32K, False)
+
+        self.check_win32k_status(
+            status=ContentWin32kLockdownState.MissingRemoteWebGL,
+            sessionStatus=ContentWin32kLockdownState.MissingRemoteWebGL,
+            experimentStatus=ExperimentStatus.UNENROLLED,
+            pref=False,
+            enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+        )
diff --git a/toolkit/xre/test/marionette/test_win32k_enrollment.template.py b/toolkit/xre/test/marionette/test_win32k_enrollment.template.py
new file mode 100644
index 0000000000..30dc7fed33
--- /dev/null
+++ b/toolkit/xre/test/marionette/test_win32k_enrollment.template.py
@@ -0,0 +1,204 @@
+from contextlib import contextmanager
+
+from marionette_harness import MarionetteTestCase
+
+
+class ExperimentStatus:
+    UNENROLLED = 0
+    ENROLLED_CONTROL = 1
+    ENROLLED_TREATMENT = 2
+    DISQUALIFIED = 3
+
+
+class ContentWin32kLockdownState:
+    LockdownEnabled = 1
+    MissingWebRender = 2
+    OperatingSystemNotSupported = 3
+    PrefNotSet = 4
+    MissingRemoteWebGL = 5
+    MissingNonNativeTheming = 6
+    DisabledByEnvVar = 7
+    DisabledBySafeMode = 8
+    DisabledByE10S = 9
+    DisabledByUserPref = 10
+    EnabledByUserPref = 11
+    DisabledByControlGroup = 12
+    EnabledByTreatmentGroup = 13
+    DisabledByDefault = 14
+    EnabledByDefault = 15
+
+
+class Prefs:
+    ENROLLMENT_STATUS = "security.sandbox.content.win32k-experiment.enrollmentStatus"
+    STARTUP_ENROLLMENT_STATUS = (
+        "security.sandbox.content.win32k-experiment.startupEnrollmentStatus"
+    )
+    WIN32K = "security.sandbox.content.win32k-disable"
+    WEBGL = "webgl.out-of-process"
+
+
+ENV_DISABLE_WIN32K = "MOZ_ENABLE_WIN32K"
+ENV_DISABLE_E10S = "MOZ_FORCE_DISABLE_E10S"
+
+
+class TestWin32kAutostart(MarionetteTestCase):
+    SANDBOX_NAME = "win32k-autostart"
+
+    def execute_script(self, code, *args, **kwargs):
+        with self.marionette.using_context(self.marionette.CONTEXT_CHROME):
+            return self.marionette.execute_script(
+                code, new_sandbox=False, sandbox=self.SANDBOX_NAME, *args, **kwargs
+            )
+
+    def get_win32k_status(self):
+        return self.execute_script(
+            r"""
+          let win = Services.wm.getMostRecentWindow("navigator:browser");
+          let ses = "security.sandbox.content.win32k-experiment.startupEnrollmentStatus";
+          return {
+            win32kSessionStatus: Services.appinfo.win32kSessionStatus,
+            win32kStatus: Services.appinfo.win32kLiveStatusTestingOnly,
+            win32kExperimentStatus: Services.appinfo.win32kExperimentStatus,
+            win32kPref: Services.prefs.getBoolPref("security.sandbox.content.win32k-disable"),
+            win32kStartupEnrollmentStatusPref: Services.prefs.getIntPref(ses),
+          };
+        """
+        )
+
+    def check_win32k_status(
+        self, status, sessionStatus, experimentStatus, pref, enrollmentStatusPref
+    ):
+        # We CANNOT check win32kEnrollmentStatusPref after a restart because we only set this
+        # pref on the default branch, and it goes away after a restart, so we only check
+        # the startupEnrollmentStatusPref
+        expected = {
+            "win32kSessionStatus": sessionStatus,
+            "win32kStatus": status,
+            "win32kExperimentStatus": experimentStatus,
+            "win32kPref": pref,
+            "win32kStartupEnrollmentStatusPref": enrollmentStatusPref,
+        }
+
+        status = self.get_win32k_status()
+
+        for prop, value in expected.items():
+            self.assertEqual(
+                status[prop],
+                value,
+                "%s should have the value `%r`, but has `%r`"
+                % (prop, value, status[prop]),
+            )
+
+    def set_env(self, env, value):
+        self.execute_script(
+            "env.set(arguments[0], arguments[1]);", script_args=(env, value)
+        )
+
+    def get_env(self, env):
+        return self.execute_script("return env.get(arguments[0]);", script_args=(env,))
+
+    def set_enrollment_status(self, status):
+        self.marionette.set_pref(Prefs.ENROLLMENT_STATUS, status, default_branch=True)
+
+        updated_status = self.marionette.get_pref(Prefs.ENROLLMENT_STATUS)
+        self.assertTrue(
+            status == updated_status or updated_status == ExperimentStatus.DISQUALIFIED
+        )
+        startup_status = self.marionette.get_pref(Prefs.STARTUP_ENROLLMENT_STATUS)
+        self.assertEqual(
+            startup_status,
+            updated_status,
+            "Startup enrollment status (%r) should match "
+            "session status (%r)" % (startup_status, updated_status),
+        )
+
+    def restart(self, prefs=None, env=None):
+        if prefs:
+            self.marionette.set_prefs(prefs)
+
+        if env:
+            for name, value in env.items():
+                self.set_env(name, value)
+
+        self.marionette.restart(in_app=True, clean=False)
+        self.setUpSession()
+
+        # Sanity check our environment.
+        if prefs:
+            for key, val in prefs.items():
+                if val is not None:
+                    self.assertEqual(self.marionette.get_pref(key), val)
+        if env:
+            for key, val in env.items():
+                self.assertEqual(self.get_env(key), val or "")
+
+    def setUpSession(self):
+        self.marionette.set_context(self.marionette.CONTEXT_CHROME)
+
+        self.execute_script(
+            r"""
+          // We're running in a function, in a sandbox, that inherits from an
+          // X-ray wrapped window. Anything we want to be globally available
+          // needs to be defined on that window.
+          window.env = Services.env;
+        """
+        )
+
+    @contextmanager
+    def full_restart(self):
+        profile = self.marionette.instance.profile
+        try:
+            self.marionette.quit()
+            yield profile
+        finally:
+            self.marionette.start_session()
+            self.setUpSession()
+
+    def setUp(self):
+        super(TestWin32kAutostart, self).setUp()
+
+        # If we have configured marionette to require a particular value for
+        # `win32k.autostart`, remove it as a forced pref until `tearDown`, and
+        # perform a clean restart, so we run this test without the pref
+        # pre-configured.
+        self.win32kRequired = None
+        if Prefs.WIN32K in self.marionette.instance.required_prefs:
+            self.win32kRequired = self.marionette.instance.required_prefs[Prefs.WIN32K]
+            del self.marionette.instance.required_prefs[Prefs.WIN32K]
+            self.marionette.restart(in_app=False, clean=True)
+
+        self.setUpSession()
+
+        # Marionette doesn't let you set preferences on the default branch before startup
+        # so we can't test the default=False and default=True scenarios in one test
+        # What we can do is generate all the tests, and then only run the runs for which
+        # the default is.  (And run the other ones locally to make sure they work before
+        # we land it.)
+        prefJS = 'return Services.prefs.getBoolPref("security.sandbox.content.win32k-disable");'
+        self.default_is = self.execute_script(prefJS)
+
+        if self.default_is is False:
+            # Win32k status must start out with `disabledByDefault`
+            self.check_win32k_status(
+                status=ContentWin32kLockdownState.DisabledByDefault,
+                sessionStatus=ContentWin32kLockdownState.DisabledByDefault,
+                experimentStatus=ExperimentStatus.UNENROLLED,
+                pref=False,
+                enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+            )
+        else:
+            # Win32k status must start out with `enabledByDefault`
+            self.check_win32k_status(
+                status=ContentWin32kLockdownState.EnabledByDefault,
+                sessionStatus=ContentWin32kLockdownState.EnabledByDefault,
+                experimentStatus=ExperimentStatus.UNENROLLED,
+                pref=True,
+                enrollmentStatusPref=ExperimentStatus.UNENROLLED,
+            )
+
+    def tearDown(self):
+        if self.win32kRequired is not None:
+            self.marionette.instance.required_prefs[Prefs.WIN32K] = self.win32kRequired
+        self.marionette.restart(in_app=False, clean=True)
+
+        super(TestWin32kAutostart, self).tearDown()
diff --git a/toolkit/xre/test/marionette/win32k_tests.txt b/toolkit/xre/test/marionette/win32k_tests.txt
new file mode 100644
index 0000000000..76068de268
--- /dev/null
+++ b/toolkit/xre/test/marionette/win32k_tests.txt
@@ -0,0 +1,167 @@
+#############################################

+# This file serves as the test case list for gen_win32k_tests.py

+

+#############################################

+# Only here for reference:

+

+# MissingWebRender = 2

+# OperatingSystemNotSupported = 3

+# MissingRemoteWebGL = 5

+# DisabledByEnvVar = 7

+# DisabledBySafeMode = 8

+# DisabledByE10S = 9

+# DisabledByUserPref = 10

+# EnabledByUserPref = 11

+# DisabledByControlGroup = 12

+# EnabledByTreatmentGroup = 13

+# DisabledByDefault = 14

+# EnabledByDefault = 15

+

+# UNENROLLED

+# ENROLLED_CONTROL

+# ENROLLED_TREATMENT

+# DISQUALIFIED

+

+#############################################

+# Assertion Mappings

+# Shorthand values for the test cases below.  Instead of writing out the whole thing

+# you can just do [A#5]

+

+ > 1  : [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=UNENROLLED]

+ > 1T : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 2  : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 3  : [A S=EnabledByUserPref SS=DisabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 3T : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 4  : [A S=EnabledByUserPref SS=EnabledByUserPref ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 4T : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 5  : [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=ENROLLED_CONTROL]

+ > 5T : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_CONTROL]

+ > 6  : [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=False ESP=ENROLLED_CONTROL]

+ > 6T : [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL]

+ > 7  : [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=ENROLLED_TREATMENT]

+ > 7T : [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_TREATMENT]

+ > 8  : [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=False ESP=ENROLLED_TREATMENT]

+ > 8T : [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT]

+ > 9  : [A S=MissingRemoteWebGL SS=DisabledByDefault ES=UNENROLLED P=False ESP=UNENROLLED]

+ > 9T : [A S=MissingRemoteWebGL SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ > 10 : [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=False ESP=UNENROLLED]

+ > 10T: [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=UNENROLLED]

+ 

+

+# TODO

+# - win32k env var tests

+

+

+#############################################

+# Tests

+

+# Syntax:

+#   [D=T] - is the default value for win32k lockdown pref 'false' or 'true'

+#   Action -> Action

+#       Valid Actions: 

+#             Nothing

+#             Enrolled Control/Treatment

+#             On/Off (changes win32k pref)

+#             Restart

+#             E10s (Restarts with E10s disabled)

+#             Header-On - Restart with MOZ_ENABLE_WIN32K set

+#             Header-Off - unset MOZ_ENABLE_WIN32K but do not restart

+#             Bad Requirements - sets webg out of process to false, invalidating win32k

+#             Enrolled /Control/Treatment]-C:

+#                   The enrollment pref is set by normandy on _every_ startup on the

+#                   default branch, where it doesn't persist.

+#                   This action represents normandy doing its normal set that

+#                   occurs after a restart.  If Normandy doesn't do it, the

+#                   startupEnrollmentPref is set back to 0 after restart, which is expected.

+#   [A S= SS= ES= P= ESP=] - trigger an assertion check for the listed values

+#        S  - 'Status' or the current value of calculating GetWin32kLockdownState()

+#        SS - 'Session Status' or the current value of set-once-at-startup static variable gWin32kStatus

+#        ES - 'Experiment Status' or the value of gWin32kExperimentStatus

+#        P  - 'Pref' or the value of security.sandbox.content.win32k-disable

+#        ESP- 'Enrollment Status Pref' or the value of security.sandbox.content.win32k-experiment.startupEnrollmentStatus

+#   [A#5] - trigger an assertion check from the mapping table above

+

+

+# Safe Mode tests are currently not generated, as I don't know how to make marionette restart in safe mode

+

+#################

+ - [D=F] Nothing [A#1] -> Enrolled Control [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=ENROLLED_CONTROL] -> Restart [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=False ESP=ENROLLED_CONTROL]

+ - [D=F] Nothing [A#1] -> Enrolled Treatment [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=ENROLLED_TREATMENT] -> Restart [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=False ESP=ENROLLED_TREATMENT]

+ - [D=F] Nothing [A#1] -> On [A S=EnabledByUserPref SS=DisabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A S=EnabledByUserPref SS=EnabledByUserPref ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] Nothing [A#1] -> Off [A#1] -> Restart [A#1]

+ - [D=F] Nothing [A#1] -> On -> Bad Requirements [A S=MissingRemoteWebGL SS=DisabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] Nothing [A#1] -> On -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] Nothing [A#1] -> On -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED] -> Header-Off [A S=EnabledByUserPref SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] Nothing [A#1] -> Safe Mode -> Restart

+

+#################

+ - [D=T] Nothing [A#1T] -> Enrolled Control [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_CONTROL] -> Restart [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL]

+ - [D=T] Nothing [A#1T] -> Enrolled Treatment [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT]

+ - [D=T] Nothing [A#1T] -> On [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] Nothing [A#1T] -> Off [A S=DisabledByUserPref SS=EnabledByDefault ES=UNENROLLED P=False ESP=UNENROLLED] -> Restart [A S=DisabledByUserPref SS=DisabledByUserPref ES=UNENROLLED P=False ESP=UNENROLLED]

+ - [D=T] Nothing [A#1T] -> On -> Bad Requirements [A S=MissingRemoteWebGL SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] Nothing [A#1T] -> On -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] Nothing [A#1T] -> On -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED] -> Header-Off [A S=EnabledByDefault SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] Nothing [A#1T] -> Safe Mode -> Restart

+

+#################

+ - [D=F] On [A#3] -> Restart [A#4] -> Enrolled Control [A S=EnabledByUserPref SS=EnabledByUserPref ES=UNENROLLED P=True ESP=ENROLLED_CONTROL] -> Restart [A S=EnabledByUserPref SS=EnabledByUserPref ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=F] On [A#3] -> Restart [A#4] -> Enrolled Treatment [A S=EnabledByUserPref SS=EnabledByUserPref ES=UNENROLLED P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=EnabledByUserPref SS=EnabledByUserPref ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=F] On [A#3] -> Restart [A#4] -> Off [A S=DisabledByDefault SS=EnabledByUserPref ES=UNENROLLED P=False ESP=UNENROLLED] -> Restart [A S=DisabledByDefault SS=DisabledByDefault ES=UNENROLLED P=False ESP=UNENROLLED]

+ - [D=F] On [A#3] -> Restart [A#4] -> Bad Requirements [A S=MissingRemoteWebGL SS=EnabledByUserPref ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] On [A#3] -> Restart [A#4] -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A#4]

+ - [D=F] On [A#3] -> Restart [A#4] -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED] -> Header-Off -> Restart [A#4]

+ - [D=F] On [A#3] -> Restart [A#4] -> Safe Mode

+

+#################

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Enrolled Control [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_CONTROL] -> Restart [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Enrolled Treatment [A S=EnabledByDefault SS=EnabledByDefault ES=UNENROLLED P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Off [A S=DisabledByUserPref SS=EnabledByDefault ES=UNENROLLED P=False ESP=UNENROLLED] -> Restart [A S=DisabledByUserPref SS=DisabledByUserPref ES=UNENROLLED P=False ESP=UNENROLLED]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Bad Requirements [A S=MissingRemoteWebGL SS=EnabledByDefault ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=UNENROLLED P=True ESP=UNENROLLED] -> Restart [A#4T]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=UNENROLLED P=True ESP=UNENROLLED] -> Header-Off -> Restart [A#4T]

+ - [D=T] On [A#3T] -> Restart [A#4T] -> Safe Mode

+

+#################

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> On [A S=EnabledByUserPref SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=DISQUALIFIED] -> Restart [A S=EnabledByUserPref SS=EnabledByUserPref ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Off [A#6]

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> Bad Requirements [A S=MissingRemoteWebGL SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=False ESP=ENROLLED_CONTROL] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=False ESP=DISQUALIFIED]

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=ENROLLED_CONTROL P=False ESP=ENROLLED_CONTROL] -> Enrolled Control-C -> Restart [A#6]

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Enrolled Control-C -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=ENROLLED_CONTROL P=False ESP=ENROLLED_CONTROL] -> Header-Off -> Enrolled Control-C -> Restart [A#6]

+ - [D=F] Enrolled Control [A#5] -> Restart [A#6] -> Safe Mode -> 

+

+#################

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> On [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL] -> Restart [A S=DisabledByControlGroup SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL]

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Off [A S=DisabledByUserPref SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=False ESP=DISQUALIFIED]

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> Bad Requirements [A S=MissingRemoteWebGL SS=DisabledByControlGroup ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL] -> Enrolled Control-C -> Restart [A#6T]

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Enrolled Control-C -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=ENROLLED_CONTROL P=True ESP=ENROLLED_CONTROL] -> Header-Off -> Enrolled Control-C -> Restart [A#6T]

+ - [D=T] Enrolled Control [A#5T] -> Restart [A#6T] -> Safe Mode -> 

+

+#################

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> On [A S=EnabledByUserPref SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=DISQUALIFIED] -> Restart [A S=EnabledByUserPref SS=EnabledByUserPref ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Off [A#8] -> Restart [A#8]

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Bad Requirements [A S=MissingRemoteWebGL SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=False ESP=ENROLLED_TREATMENT] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=False ESP=DISQUALIFIED]

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=ENROLLED_TREATMENT P=False ESP=ENROLLED_TREATMENT] -> Enrolled Treatment-C -> Restart [A#8]

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Enrolled Treatment-C -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=ENROLLED_TREATMENT P=False ESP=ENROLLED_TREATMENT] -> Header-Off -> Enrolled Treatment-C -> Restart [A#8]

+ - [D=F] Enrolled Treatment [A#7] -> Restart [A#8] -> Safe Mode ->

+

+#################

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> On [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=EnabledByTreatmentGroup SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT]

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Off [A S=DisabledByUserPref SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=False ESP=DISQUALIFIED] -> Restart [A S=DisabledByUserPref SS=DisabledByUserPref ES=DISQUALIFIED P=False ESP=DISQUALIFIED]

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Bad Requirements [A S=MissingRemoteWebGL SS=EnabledByTreatmentGroup ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=True ESP=DISQUALIFIED]

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> E10S [A S=DisabledByE10S SS=DisabledByE10S ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT] -> Enrolled Treatment-C -> Restart [A#8T]

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Enrolled Treatment-C -> Header-On [A S=DisabledByEnvVar SS=DisabledByEnvVar ES=ENROLLED_TREATMENT P=True ESP=ENROLLED_TREATMENT] -> Header-Off -> Enrolled Treatment-C -> Restart [A#8T]

+ - [D=T] Enrolled Treatment [A#7T] -> Restart [A#8T] -> Safe Mode ->

+

+#################

+ - [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Enrolled Control [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=False ESP=ENROLLED_CONTROL] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=False ESP=DISQUALIFIED] 

+ - [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Enrolled Treatment [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=False ESP=ENROLLED_TREATMENT] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=False ESP=DISQUALIFIED] 

+ - [D=F] Bad Requirements [A#9] -> Restart [A#10] -> On [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=F] Bad Requirements [A#9] -> Restart [A#10] -> Off [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=False ESP=UNENROLLED]

+

+#################

+ - [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Enrolled Control [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=ENROLLED_CONTROL] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=True ESP=DISQUALIFIED] 

+ - [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Enrolled Treatment [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=ENROLLED_TREATMENT] -> Restart [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=DISQUALIFIED P=True ESP=DISQUALIFIED] 

+ - [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> On [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=True ESP=UNENROLLED]

+ - [D=T] Bad Requirements [A#9T] -> Restart [A#10T] -> Off [A S=MissingRemoteWebGL SS=MissingRemoteWebGL ES=UNENROLLED P=False ESP=UNENROLLED]

diff --git a/toolkit/xre/test/mochitest.toml b/toolkit/xre/test/mochitest.toml
new file mode 100644
index 0000000000..6899e9310f
--- /dev/null
+++ b/toolkit/xre/test/mochitest.toml
@@ -0,0 +1,3 @@
+[DEFAULT]
+
+["test_fpuhandler.html"]
diff --git a/toolkit/xre/test/show_hash.js b/toolkit/xre/test/show_hash.js
new file mode 100644
index 0000000000..28674e6840
--- /dev/null
+++ b/toolkit/xre/test/show_hash.js
@@ -0,0 +1,4 @@
+const xre = Cc["@mozilla.org/xre/directory-provider;1"].getService(
+  Ci.nsIXREDirProvider
+);
+dump(`${xre.getInstallHash(false)}\n`);
diff --git a/toolkit/xre/test/test_fpuhandler.html b/toolkit/xre/test/test_fpuhandler.html
new file mode 100644
index 0000000000..a3869f2ecf
--- /dev/null
+++ b/toolkit/xre/test/test_fpuhandler.html
@@ -0,0 +1,36 @@
+<head>
+  <title>Floating-point exception handler test</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+
+<body onload="runTest()">
+  <embed id="plugin1" type="application/x-test" width="400" height="400"></embed>
+
+  <script class="testbody" type="application/javascript">
+  SimpleTest.waitForExplicitFinish();
+
+  function doDiv(x, y) {
+    var z;
+    z = x / y;
+
+    for (let i = 0 + x; i < 1000; ++i)
+      z = y / x;
+
+    z = x / y;
+    return z;
+  }
+
+  function runTest() {
+    ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash");
+
+    try {
+      document.getElementById("plugin1").enableFPExceptions();
+    } catch (e) {
+      ok(true, "No special code to set the FPU bit in the testplugin.");
+      SimpleTest.finish();
+      return;
+    }
+
+    ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash again.");
+    SimpleTest.finish();
+  }
+  </script>
diff --git a/toolkit/xre/test/test_install_hash.js b/toolkit/xre/test/test_install_hash.js
new file mode 100644
index 0000000000..9dc331fac5
--- /dev/null
+++ b/toolkit/xre/test/test_install_hash.js
@@ -0,0 +1,146 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * This runs the xpcshell binary with different cases for the executable path.
+ * They should all result in the same installation hash.
+ */
+
+const { Subprocess } = ChromeUtils.importESModule(
+  "resource://gre/modules/Subprocess.sys.mjs"
+);
+
+const XRE = Cc["@mozilla.org/xre/directory-provider;1"].getService(
+  Ci.nsIXREDirProvider
+);
+const HASH = XRE.getInstallHash(false);
+const EXE = Services.dirsvc.get("XREExeF", Ci.nsIFile);
+const SCRIPT = do_get_file("show_hash.js", false);
+
+async function getHash(bin) {
+  try {
+    // If this test is running through firefox.exe -xpcshell, we need
+    // to make sure to execute the script through it as well.
+    let args = [];
+    if (!bin.leafName.startsWith("xpcshell")) {
+      args.push("-xpcshell");
+    }
+    args.push(SCRIPT.path);
+
+    let proc = await Subprocess.call({
+      command: bin.path,
+      arguments: args,
+    });
+
+    let result = "";
+    let string;
+    while ((string = await proc.stdout.readString())) {
+      result += string;
+    }
+
+    return result.trim();
+  } catch (e) {
+    if (e.errorCode == Subprocess.ERROR_BAD_EXECUTABLE) {
+      return null;
+    }
+    throw e;
+  }
+}
+
+// Walks through a path's entries and calls a mutator function to change the
+// case of each.
+function mutatePath(path, mutator) {
+  let parts = [];
+  let index = 0;
+  while (path.parent != null) {
+    parts.push(mutator(path.leafName, index++));
+    path = path.parent;
+  }
+
+  while (parts.length) {
+    path.append(parts.pop());
+  }
+
+  return path;
+}
+
+// Counts how many path parts a mutator will be called for.
+function countParts(path) {
+  let index = 0;
+  while (path.parent != null) {
+    path = path.parent;
+    index++;
+  }
+  return index;
+}
+
+add_task(async function testSameBinary() {
+  // Running with the same binary path should definitely work and give the same
+  // hash.
+  Assert.equal(
+    await getHash(EXE),
+    HASH,
+    "Should have the same hash when running the same binary."
+  );
+});
+
+add_task(async function testUpperCase() {
+  let upper = mutatePath(EXE, p => p.toLocaleUpperCase());
+  let hash = await getHash(upper);
+
+  // We may not get a hash if any part of the filesystem is case sensitive.
+  if (hash) {
+    Assert.equal(
+      hash,
+      HASH,
+      `Should have seen the same hash from ${upper.path}.`
+    );
+  }
+});
+
+add_task(async function testLowerCase() {
+  let lower = mutatePath(EXE, p => p.toLocaleLowerCase());
+  let hash = await getHash(lower);
+
+  // We may not get a hash if any part of the filesystem is case sensitive.
+  if (hash) {
+    Assert.equal(
+      hash,
+      HASH,
+      `Should have seen the same hash from ${lower.path}.`
+    );
+  }
+});
+
+add_task(async function testEachPart() {
+  // We need to check the case where only some of the directories in the path
+  // are case insensitive.
+
+  let count = countParts(EXE);
+  for (let i = 0; i < count; i++) {
+    let upper = mutatePath(EXE, (p, index) =>
+      index == i ? p.toLocaleUpperCase() : p
+    );
+    let lower = mutatePath(EXE, (p, index) =>
+      index == i ? p.toLocaleLowerCase() : p
+    );
+
+    let upperHash = await getHash(upper);
+    if (upperHash) {
+      Assert.equal(
+        upperHash,
+        HASH,
+        `Should have seen the same hash from ${upper.path}.`
+      );
+    }
+
+    let lowerHash = await getHash(lower);
+    if (lowerHash) {
+      Assert.equal(
+        lowerHash,
+        HASH,
+        `Should have seen the same hash from ${lower.path}.`
+      );
+    }
+  }
+});
diff --git a/toolkit/xre/test/test_launch_without_hang.js b/toolkit/xre/test/test_launch_without_hang.js
new file mode 100644
index 0000000000..feacae36d4
--- /dev/null
+++ b/toolkit/xre/test/test_launch_without_hang.js
@@ -0,0 +1,256 @@
+// 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/.
+
+// bug 1360493
+// Launch the browser a number of times, testing startup hangs.
+
+"use strict";
+
+const { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+
+const APP_TIMER_TIMEOUT_MS = 1000 * 15;
+const TRY_COUNT = 50;
+
+// Sets a group of environment variables, returning the old values.
+// newVals AND return value is an array of { key: "", value: "" }
+function setEnvironmentVariables(newVals) {
+  let oldVals = [];
+  for (let i = 0; i < newVals.length; ++i) {
+    let key = newVals[i].key;
+    let value = newVals[i].value;
+    let oldObj = { key };
+    if (Services.env.exists(key)) {
+      oldObj.value = Services.env.get(key);
+    } else {
+      oldObj.value = null;
+    }
+
+    Services.env.set(key, value);
+    oldVals.push(oldObj);
+  }
+  return oldVals;
+}
+
+function getFirefoxExecutableFilename() {
+  if (AppConstants.platform === "win") {
+    return AppConstants.MOZ_APP_NAME + ".exe";
+  }
+  return AppConstants.MOZ_APP_NAME;
+}
+
+// Returns a nsIFile to the firefox.exe executable file
+function getFirefoxExecutableFile() {
+  let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
+  file = Services.dirsvc.get("GreBinD", Ci.nsIFile);
+
+  file.append(getFirefoxExecutableFilename());
+  return file;
+}
+
+// Takes an executable and arguments, and wraps it in a call to the system shell.
+// Technique adapted from \toolkit\mozapps\update\tests\unit_service_updater\xpcshellUtilsAUS.js
+// to avoid child process console output polluting the xpcshell log.
+// returns { file: (nsIFile), args: [] }
+function wrapLaunchInShell(file, args) {
+  let ret = {};
+
+  if (AppConstants.platform === "win") {
+    ret.file = Services.dirsvc.get("WinD", Ci.nsIFile);
+    ret.file.append("System32");
+    ret.file.append("cmd.exe");
+    ret.args = ["/D", "/Q", "/C", file.path].concat(args).concat([">nul"]);
+  } else {
+    ret.file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
+    ret.file.initWithPath("/usr/bin/env");
+    ret.args = [file.path].concat(args).concat(["> /dev/null"]);
+  }
+
+  Assert.ok(
+    ret.file.exists(),
+    "Executable file should exist: " + ret.file.path
+  );
+
+  return ret;
+}
+
+// Needed because process.kill() kills the console, not its child process, firefox.
+function terminateFirefox(completion) {
+  let executableName = getFirefoxExecutableFilename();
+  let file;
+  let args;
+
+  if (AppConstants.platform === "win") {
+    file = Services.dirsvc.get("WinD", Ci.nsIFile);
+    file.append("System32");
+    file.append("taskkill.exe");
+    args = ["/F", "/IM", executableName];
+  } else {
+    file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
+    file.initWithPath("/usr/bin/killall");
+    args = [executableName];
+  }
+
+  info("launching application: " + file.path);
+  info("            with args: " + args.join(" "));
+
+  let process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
+  process.init(file);
+
+  let processObserver = {
+    observe: function PO_observe(aSubject, aTopic, aData) {
+      info("topic: " + aTopic + ", process exitValue: " + process.exitValue);
+
+      Assert.equal(
+        process.exitValue,
+        0,
+        "Terminate firefox process exit value should be 0"
+      );
+      Assert.equal(
+        aTopic,
+        "process-finished",
+        "Terminate firefox observer topic should be process-finished"
+      );
+
+      if (completion) {
+        completion();
+      }
+    },
+    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+  };
+
+  process.runAsync(args, args.length, processObserver);
+
+  info("             with pid: " + process.pid);
+}
+
+// Launches file with args asynchronously, failing if the process did not
+// exit within timeoutMS milliseconds. If a timeout occurs, handler()
+// is called.
+function launchProcess(file, args, env, timeoutMS, handler, attemptCount) {
+  let state = {};
+
+  state.attempt = attemptCount;
+
+  state.processObserver = {
+    observe: function PO_observe(aSubject, aTopic, aData) {
+      if (!state.appTimer) {
+        // the app timer has been canceled; this process has timed out already so don't process further.
+        handler(false);
+        return;
+      }
+
+      info(
+        "topic: " + aTopic + ", process exitValue: " + state.process.exitValue
+      );
+
+      info("Restoring environment variables");
+      setEnvironmentVariables(state.oldEnv);
+
+      state.appTimer.cancel();
+      state.appTimer = null;
+
+      Assert.equal(
+        state.process.exitValue,
+        0,
+        "the application process exit value should be 0"
+      );
+      Assert.equal(
+        aTopic,
+        "process-finished",
+        "the application process observer topic should be process-finished"
+      );
+
+      handler(true);
+    },
+    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+  };
+
+  // The timer callback to kill the process if it takes too long.
+  state.appTimerCallback = {
+    notify: function TC_notify(aTimer) {
+      state.appTimer = null;
+
+      info("Restoring environment variables");
+      setEnvironmentVariables(state.oldEnv);
+
+      if (state.process.isRunning) {
+        info("attempting to kill process");
+
+        // This will cause the shell process to exit as well, triggering our process observer.
+        terminateFirefox(function terminateFirefoxCompletion() {
+          Assert.ok(false, "Launch application timer expired");
+        });
+      }
+    },
+    QueryInterface: ChromeUtils.generateQI(["nsITimerCallback"]),
+  };
+
+  info("launching application: " + file.path);
+  info("            with args: " + args.join(" "));
+  info("     with environment: ");
+  for (let i = 0; i < env.length; ++i) {
+    info("             " + env[i].key + "=" + env[i].value);
+  }
+
+  state.process = Cc["@mozilla.org/process/util;1"].createInstance(
+    Ci.nsIProcess
+  );
+  state.process.init(file);
+
+  state.appTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+  state.appTimer.initWithCallback(
+    state.appTimerCallback,
+    timeoutMS,
+    Ci.nsITimer.TYPE_ONE_SHOT
+  );
+
+  state.oldEnv = setEnvironmentVariables(env);
+
+  state.process.runAsync(args, args.length, state.processObserver);
+
+  info("             with pid: " + state.process.pid);
+}
+
+function run_test() {
+  do_test_pending();
+
+  let env = [
+    { key: "MOZ_CRASHREPORTER_DISABLE", value: null },
+    { key: "MOZ_CRASHREPORTER", value: "1" },
+    { key: "MOZ_CRASHREPORTER_NO_REPORT", value: "1" },
+    { key: "MOZ_CRASHREPORTER_SHUTDOWN", value: "1" },
+    { key: "XPCOM_DEBUG_BREAK", value: "stack-and-abort" },
+  ];
+
+  let triesStarted = 1;
+
+  let handler = function launchFirefoxHandler(okToContinue) {
+    triesStarted++;
+    if (triesStarted <= TRY_COUNT && okToContinue) {
+      testTry();
+    } else {
+      do_test_finished();
+    }
+  };
+
+  let testTry = function testTry() {
+    let shell = wrapLaunchInShell(getFirefoxExecutableFile(), [
+      "-no-remote",
+      "-test-launch-without-hang",
+    ]);
+    info("Try attempt #" + triesStarted);
+    launchProcess(
+      shell.file,
+      shell.args,
+      env,
+      APP_TIMER_TIMEOUT_MS,
+      handler,
+      triesStarted
+    );
+  };
+
+  testTry();
+}
diff --git a/toolkit/xre/test/win/Makefile.in b/toolkit/xre/test/win/Makefile.in
new file mode 100644
index 0000000000..5a67b8eac8
--- /dev/null
+++ b/toolkit/xre/test/win/Makefile.in
@@ -0,0 +1,11 @@
+# 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/.
+
+MOZ_WINCONSOLE = 1
+
+include $(topsrcdir)/config/rules.mk
+
+check::
+	@echo 'Running TestXREMakeCommandLineWin tests'
+	@$(RUN_TEST_PROGRAM) $(FINAL_TARGET)/TestXREMakeCommandLineWin.exe
diff --git a/toolkit/xre/test/win/TestLauncherRegistryInfo.cpp b/toolkit/xre/test/win/TestLauncherRegistryInfo.cpp
new file mode 100644
index 0000000000..ab5edcf1ca
--- /dev/null
+++ b/toolkit/xre/test/win/TestLauncherRegistryInfo.cpp
@@ -0,0 +1,783 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+#define MOZ_USE_LAUNCHER_ERROR
+
+#include "mozilla/LauncherRegistryInfo.h"
+#include "mozilla/NativeNt.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Unused.h"
+#include "nsWindowsHelpers.h"
+
+#include "LauncherRegistryInfo.cpp"
+
+#include <string>
+
+static const char kMsgStart[] = "TEST-FAILED | LauncherRegistryInfo | ";
+
+static const wchar_t kRegKeyPath[] = L"SOFTWARE\\" EXPAND_STRING_MACRO(
+    MOZ_APP_VENDOR) L"\\" EXPAND_STRING_MACRO(MOZ_APP_BASENAME) L"\\Launcher";
+static const wchar_t kBrowserSuffix[] = L"|Browser";
+static const wchar_t kLauncherSuffix[] = L"|Launcher";
+static const wchar_t kImageSuffix[] = L"|Image";
+static const wchar_t kTelemetrySuffix[] = L"|Telemetry";
+
+static std::wstring gBrowserValue;
+static std::wstring gLauncherValue;
+static std::wstring gImageValue;
+static std::wstring gTelemetryValue;
+
+static DWORD gMyImageTimestamp;
+
+#define RUN_TEST(result, fn)                                                 \
+  if ((result = fn()).isErr()) {                                             \
+    const mozilla::LauncherError& err = result.inspectErr();                 \
+    printf("%s%s | %08lx (%s:%d)\n", kMsgStart, #fn, err.mError.AsHResult(), \
+           err.mFile, err.mLine);                                            \
+    return 1;                                                                \
+  }
+
+#define EXPECT_COMMIT_IS_OK()                        \
+  do {                                               \
+    mozilla::LauncherVoidResult vr2 = info.Commit(); \
+    if (vr2.isErr()) {                               \
+      return vr2;                                    \
+    }                                                \
+  } while (0)
+
+#define EXPECT_CHECK_RESULT_IS(desired, expected)                       \
+  do {                                                                  \
+    mozilla::LauncherResult<mozilla::LauncherRegistryInfo::ProcessType> \
+        result = info.Check(mozilla::LauncherRegistryInfo::desired);    \
+    if (result.isErr()) {                                               \
+      return result.propagateErr();                                     \
+    }                                                                   \
+    if (result.unwrap() != mozilla::LauncherRegistryInfo::expected) {   \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_FAIL);                       \
+    }                                                                   \
+  } while (0)
+
+#define EXPECT_ENABLED_STATE_IS(expected)                                \
+  do {                                                                   \
+    mozilla::LauncherResult<mozilla::LauncherRegistryInfo::EnabledState> \
+        enabled = info.IsEnabled();                                      \
+    if (enabled.isErr()) {                                               \
+      return enabled.propagateErr();                                     \
+    }                                                                    \
+    if (enabled.unwrap() != mozilla::LauncherRegistryInfo::expected) {   \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);                  \
+    }                                                                    \
+  } while (0)
+
+#define EXPECT_TELEMETRY_IS_ENABLED(expected)                          \
+  do {                                                                 \
+    mozilla::LauncherResult<bool> enabled = info.IsTelemetryEnabled(); \
+    if (enabled.isErr()) {                                             \
+      return enabled.propagateErr();                                   \
+    }                                                                  \
+    if (enabled.unwrap() != expected) {                                \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);                \
+    }                                                                  \
+  } while (0)
+
+#define EXPECT_REG_DWORD_EXISTS_AND_EQ(name, expected)      \
+  do {                                                      \
+    mozilla::LauncherResult<mozilla::Maybe<DWORD>> result = \
+        ReadRegistryValueData<DWORD>(name, REG_DWORD);      \
+    if (result.isErr()) {                                   \
+      return result.propagateErr();                         \
+    }                                                       \
+    if (result.inspect().isNothing() ||                     \
+        result.inspect().value() != expected) {             \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);     \
+    }                                                       \
+  } while (0)
+
+#define EXPECT_REG_QWORD_EXISTS(name)                          \
+  do {                                                         \
+    mozilla::LauncherResult<mozilla::Maybe<uint64_t>> result = \
+        ReadRegistryValueData<uint64_t>(name, REG_QWORD);      \
+    if (result.isErr()) {                                      \
+      return result.propagateErr();                            \
+    }                                                          \
+    if (result.inspect().isNothing()) {                        \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);        \
+    }                                                          \
+  } while (0)
+
+#define EXPECT_REG_QWORD_EXISTS_AND_EQ(name, expected)         \
+  do {                                                         \
+    mozilla::LauncherResult<mozilla::Maybe<uint64_t>> result = \
+        ReadRegistryValueData<uint64_t>(name, REG_QWORD);      \
+    if (result.isErr()) {                                      \
+      return result.propagateErr();                            \
+    }                                                          \
+    if (result.inspect().isNothing() ||                        \
+        result.inspect().value() != expected) {                \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);        \
+    }                                                          \
+  } while (0)
+
+#define EXPECT_REG_DWORD_DOES_NOT_EXIST(name)               \
+  do {                                                      \
+    mozilla::LauncherResult<mozilla::Maybe<DWORD>> result = \
+        ReadRegistryValueData<DWORD>(name, REG_DWORD);      \
+    if (result.isErr()) {                                   \
+      return result.propagateErr();                         \
+    }                                                       \
+    if (result.inspect().isSome()) {                        \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);     \
+    }                                                       \
+  } while (0)
+
+#define EXPECT_REG_QWORD_DOES_NOT_EXIST(name)                  \
+  do {                                                         \
+    mozilla::LauncherResult<mozilla::Maybe<uint64_t>> result = \
+        ReadRegistryValueData<uint64_t>(name, REG_QWORD);      \
+    if (result.isErr()) {                                      \
+      return result.propagateErr();                            \
+    }                                                          \
+    if (result.inspect().isSome()) {                           \
+      return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);        \
+    }                                                          \
+  } while (0)
+
+template <typename T>
+static mozilla::LauncherResult<mozilla::Maybe<T>> ReadRegistryValueData(
+    const std::wstring& name, DWORD expectedType) {
+  T data;
+  DWORD dataLen = sizeof(data);
+  DWORD type;
+  LSTATUS status = ::RegGetValueW(HKEY_CURRENT_USER, kRegKeyPath, name.c_str(),
+                                  RRF_RT_ANY, &type, &data, &dataLen);
+  if (status == ERROR_FILE_NOT_FOUND) {
+    return mozilla::Maybe<T>();
+  }
+
+  if (status != ERROR_SUCCESS) {
+    return LAUNCHER_ERROR_FROM_WIN32(status);
+  }
+
+  if (type != expectedType) {
+    return LAUNCHER_ERROR_FROM_WIN32(ERROR_DATATYPE_MISMATCH);
+  }
+
+  return mozilla::Some(data);
+}
+
+template <typename T>
+static mozilla::LauncherVoidResult WriteRegistryValueData(
+    const std::wstring& name, DWORD type, T data) {
+  LSTATUS status = ::RegSetKeyValueW(HKEY_CURRENT_USER, kRegKeyPath,
+                                     name.c_str(), type, &data, sizeof(T));
+  if (status != ERROR_SUCCESS) {
+    return LAUNCHER_ERROR_FROM_WIN32(status);
+  }
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult DeleteRegistryValueData(
+    const std::wstring& name) {
+  LSTATUS status =
+      ::RegDeleteKeyValueW(HKEY_CURRENT_USER, kRegKeyPath, name.c_str());
+  if (status == ERROR_SUCCESS || status == ERROR_FILE_NOT_FOUND) {
+    return mozilla::Ok();
+  }
+
+  return LAUNCHER_ERROR_FROM_WIN32(status);
+}
+
+static mozilla::LauncherVoidResult DeleteAllRegstryValues() {
+  // Unblock commit via ReflectPrefToRegistry
+  // (We need to set false, and then true to bypass the early return)
+  mozilla::LauncherRegistryInfo info;
+  mozilla::LauncherVoidResult vr = info.ReflectPrefToRegistry(false);
+  vr = info.ReflectPrefToRegistry(true);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  vr = DeleteRegistryValueData(gImageValue);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  vr = DeleteRegistryValueData(gLauncherValue);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  vr = DeleteRegistryValueData(gBrowserValue);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  return DeleteRegistryValueData(gTelemetryValue);
+}
+
+bool GetInstallHash(const char16_t*, mozilla::UniquePtr<NS_tchar[]>& result) {
+  return true;
+}
+
+static mozilla::LauncherVoidResult SetupEnabledScenario() {
+  // Reset the registry state to an enabled state. First, we delete all existing
+  // registry values (if any).
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Now we run Check(Launcher)...
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  EXPECT_COMMIT_IS_OK();
+  // ...and Check(Browser)
+  EXPECT_CHECK_RESULT_IS(ProcessType::Browser, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  // By this point we are considered to be fully enabled.
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestEmptyRegistry() {
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  EXPECT_COMMIT_IS_OK();
+
+  // LauncherRegistryInfo should have created Launcher and Image values
+  EXPECT_REG_DWORD_EXISTS_AND_EQ(gImageValue, gMyImageTimestamp);
+  EXPECT_REG_QWORD_EXISTS(gLauncherValue);
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gBrowserValue);
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestNormal() {
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, gMyImageTimestamp);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD, QPCNowRaw());
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Browser, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  // Make sure the browser timestamp is newer than the launcher's
+  mozilla::LauncherResult<mozilla::Maybe<uint64_t>> launcherTs =
+      ReadRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD);
+  if (launcherTs.isErr()) {
+    return launcherTs.propagateErr();
+  }
+  mozilla::LauncherResult<mozilla::Maybe<uint64_t>> browserTs =
+      ReadRegistryValueData<uint64_t>(gBrowserValue, REG_QWORD);
+  if (browserTs.isErr()) {
+    return browserTs.propagateErr();
+  }
+  if (launcherTs.inspect().isNothing() || browserTs.inspect().isNothing() ||
+      browserTs.inspect().value() <= launcherTs.inspect().value()) {
+    return LAUNCHER_ERROR_FROM_HRESULT(E_FAIL);
+  }
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::Enabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestBrowserNoLauncher() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = DeleteRegistryValueData(gLauncherValue);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  // Verify that we still don't have a launcher timestamp
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gLauncherValue);
+  // Verify that the browser timestamp is now zero
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, 0ULL);
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestLauncherNoBrowser() {
+  constexpr uint64_t launcherTs = 0x77777777;
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, gMyImageTimestamp);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD, launcherTs);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  // Launcher's timestamps is kept intact while browser's is set to 0.
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gLauncherValue, launcherTs);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, 0ULL);
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestBrowserLessThanLauncher() {
+  constexpr uint64_t launcherTs = 0x77777777, browserTs = 0x66666666;
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, gMyImageTimestamp);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD, launcherTs);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gBrowserValue, REG_QWORD, browserTs);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  // Launcher's timestamps is kept intact while browser's is set to 0.
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gLauncherValue, launcherTs);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, 0ULL);
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestImageTimestampChange() {
+  // This should reset the timestamps and then essentially run like
+  // TestEmptyRegistry
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, 0x12345678);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD, 1ULL);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gBrowserValue, REG_QWORD, 2ULL);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  EXPECT_COMMIT_IS_OK();
+
+  EXPECT_REG_DWORD_EXISTS_AND_EQ(gImageValue, gMyImageTimestamp);
+  EXPECT_REG_QWORD_EXISTS(gLauncherValue);
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gBrowserValue);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestImageTimestampChangeWhenDisabled() {
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, 0x12345678);
+  if (vr.isErr()) {
+    return vr;
+  }
+  vr = WriteRegistryValueData<uint64_t>(gBrowserValue, REG_QWORD, 0ULL);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+
+  EXPECT_REG_DWORD_EXISTS_AND_EQ(gImageValue, gMyImageTimestamp);
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gLauncherValue);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, 0);
+
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestDisableDueToFailure() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Check that we are indeed enabled.
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_ENABLED_STATE_IS(EnabledState::Enabled);
+
+  // Now call DisableDueToFailure
+  mozilla::LauncherVoidResult lvr = info.DisableDueToFailure();
+  if (lvr.isErr()) {
+    return lvr.propagateErr();
+  }
+
+  // We should now be FailDisabled
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  // If we delete the launcher timestamp, IsEnabled should then return
+  // ForceDisabled.
+  vr = DeleteRegistryValueData(gLauncherValue);
+  if (vr.isErr()) {
+    return vr;
+  }
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestPrefReflection() {
+  // Reset the registry to a known good state.
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Let's see what happens when we flip the pref to OFF.
+  mozilla::LauncherRegistryInfo info;
+  mozilla::LauncherVoidResult reflectOk = info.ReflectPrefToRegistry(false);
+  if (reflectOk.isErr()) {
+    return reflectOk.propagateErr();
+  }
+
+  // Launcher timestamp should be non-existent.
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gLauncherValue);
+  // Browser timestamp should be zero
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, 0ULL);
+  // IsEnabled should give us ForceDisabled
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  // Now test to see what happens when the pref is set to ON.
+  reflectOk = info.ReflectPrefToRegistry(true);
+  if (reflectOk.isErr()) {
+    return reflectOk.propagateErr();
+  }
+
+  // Launcher and browser timestamps should be non-existent.
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gLauncherValue);
+  EXPECT_REG_QWORD_DOES_NOT_EXIST(gBrowserValue);
+
+  // IsEnabled should give us Enabled.
+  EXPECT_ENABLED_STATE_IS(EnabledState::Enabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestTelemetryConfig() {
+  mozilla::LauncherVoidResult vr = DeleteAllRegstryValues();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_TELEMETRY_IS_ENABLED(false);
+
+  mozilla::LauncherVoidResult reflectOk =
+      info.ReflectTelemetryPrefToRegistry(false);
+  if (reflectOk.isErr()) {
+    return reflectOk.propagateErr();
+  }
+  EXPECT_TELEMETRY_IS_ENABLED(false);
+
+  reflectOk = info.ReflectTelemetryPrefToRegistry(true);
+  if (reflectOk.isErr()) {
+    return reflectOk.propagateErr();
+  }
+  EXPECT_TELEMETRY_IS_ENABLED(true);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestCommitAbort() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Retrieve the current timestamps to compare later
+  mozilla::LauncherResult<mozilla::Maybe<uint64_t>> launcherValue =
+      ReadRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD);
+  if (launcherValue.isErr() || launcherValue.inspect().isNothing()) {
+    return launcherValue.propagateErr();
+  }
+  mozilla::LauncherResult<mozilla::Maybe<uint64_t>> browserValue =
+      ReadRegistryValueData<uint64_t>(gBrowserValue, REG_QWORD);
+  if (browserValue.isErr() || browserValue.inspect().isNothing()) {
+    return browserValue.propagateErr();
+  }
+  uint64_t launcherTs = launcherValue.inspect().value();
+  uint64_t browserTs = browserValue.inspect().value();
+
+  vr = []() -> mozilla::LauncherVoidResult {
+    mozilla::LauncherRegistryInfo info;
+    EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+    // No commit
+    return mozilla::Ok();
+  }();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Exiting the scope discards the change.
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_REG_DWORD_EXISTS_AND_EQ(gImageValue, gMyImageTimestamp);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gLauncherValue, launcherTs);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, browserTs);
+
+  // Commit -> Check -> Abort -> Commit
+  EXPECT_COMMIT_IS_OK();
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  info.Abort();
+  EXPECT_COMMIT_IS_OK();
+
+  // Nothing is changed.
+  EXPECT_REG_DWORD_EXISTS_AND_EQ(gImageValue, gMyImageTimestamp);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gLauncherValue, launcherTs);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gBrowserValue, browserTs);
+  EXPECT_ENABLED_STATE_IS(EnabledState::Enabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestDisableDuringLauncherLaunch() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherResult<mozilla::Maybe<uint64_t>> launcherTs =
+      ReadRegistryValueData<uint64_t>(gLauncherValue, REG_QWORD);
+  if (launcherTs.isErr()) {
+    return launcherTs.propagateErr();
+  }
+  if (launcherTs.inspect().isNothing()) {
+    return LAUNCHER_ERROR_FROM_HRESULT(E_UNEXPECTED);
+  }
+
+  vr = []() -> mozilla::LauncherVoidResult {
+    mozilla::LauncherRegistryInfo info;
+    EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+
+    // Call DisableDueToFailure with a different instance
+    mozilla::LauncherVoidResult vr = []() -> mozilla::LauncherVoidResult {
+      mozilla::LauncherRegistryInfo info;
+      mozilla::LauncherVoidResult vr = info.DisableDueToFailure();
+      if (vr.isErr()) {
+        return vr.propagateErr();
+      }
+      return mozilla::Ok();
+    }();
+    if (vr.isErr()) {
+      return vr;
+    }
+
+    // Commit after disable.
+    EXPECT_COMMIT_IS_OK();
+
+    return mozilla::Ok();
+  }();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Make sure we're still FailDisabled and the launcher's timestamp is not
+  // updated
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+  EXPECT_REG_QWORD_EXISTS_AND_EQ(gLauncherValue, launcherTs.inspect().value());
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestDisableDuringBrowserLaunch() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  mozilla::LauncherRegistryInfo info;
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  EXPECT_COMMIT_IS_OK();
+
+  vr = []() -> mozilla::LauncherVoidResult {
+    mozilla::LauncherRegistryInfo info;
+    EXPECT_CHECK_RESULT_IS(ProcessType::Browser, ProcessType::Browser);
+
+    // Call DisableDueToFailure with a different instance
+    mozilla::LauncherVoidResult vr = []() -> mozilla::LauncherVoidResult {
+      mozilla::LauncherRegistryInfo info;
+      mozilla::LauncherVoidResult vr = info.DisableDueToFailure();
+      if (vr.isErr()) {
+        return vr.propagateErr();
+      }
+      return mozilla::Ok();
+    }();
+    if (vr.isErr()) {
+      return vr;
+    }
+
+    // Commit after disable.
+    EXPECT_COMMIT_IS_OK();
+
+    return mozilla::Ok();
+  }();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Make sure we're still FailDisabled
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  return mozilla::Ok();
+}
+
+static mozilla::LauncherVoidResult TestReEnable() {
+  mozilla::LauncherVoidResult vr = SetupEnabledScenario();
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Make FailDisabled
+  mozilla::LauncherRegistryInfo info;
+  vr = info.DisableDueToFailure();
+  if (vr.isErr()) {
+    return vr.propagateErr();
+  }
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  // Attempt to launch when FailDisabled: Still be FailDisabled
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+  EXPECT_ENABLED_STATE_IS(EnabledState::FailDisabled);
+
+  // Change the timestamp
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, 0x12345678);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Attempt to launch again: Launcher comes back
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Launcher);
+  EXPECT_COMMIT_IS_OK();
+
+  // Make ForceDisabled
+  vr = info.ReflectPrefToRegistry(false);
+  if (vr.isErr()) {
+    return vr.propagateErr();
+  }
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  // Attempt to launch when ForceDisabled: Still be ForceDisabled
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  // Change the timestamp
+  vr = WriteRegistryValueData<DWORD>(gImageValue, REG_DWORD, 0x12345678);
+  if (vr.isErr()) {
+    return vr;
+  }
+
+  // Attempt to launch again: Still be ForceDisabled
+  EXPECT_CHECK_RESULT_IS(ProcessType::Launcher, ProcessType::Browser);
+  EXPECT_COMMIT_IS_OK();
+  EXPECT_ENABLED_STATE_IS(EnabledState::ForceDisabled);
+
+  return mozilla::Ok();
+}
+
+int main(int argc, char* argv[]) {
+  auto fullPath = mozilla::GetFullBinaryPath();
+  if (!fullPath) {
+    return 1;
+  }
+
+  // Global setup for all tests
+  gBrowserValue = fullPath.get();
+  gBrowserValue += kBrowserSuffix;
+
+  gLauncherValue = fullPath.get();
+  gLauncherValue += kLauncherSuffix;
+
+  gImageValue = fullPath.get();
+  gImageValue += kImageSuffix;
+
+  gTelemetryValue = fullPath.get();
+  gTelemetryValue += kTelemetrySuffix;
+
+  mozilla::LauncherResult<DWORD> timestamp = 0;
+  RUN_TEST(timestamp, GetCurrentImageTimestamp);
+  gMyImageTimestamp = timestamp.unwrap();
+
+  auto onExit = mozilla::MakeScopeExit(
+      []() { mozilla::Unused << DeleteAllRegstryValues(); });
+
+  mozilla::LauncherVoidResult vr = mozilla::Ok();
+
+  // All testcases should call SetupEnabledScenario() or
+  // DeleteAllRegstryValues() to be order-independent
+  RUN_TEST(vr, TestEmptyRegistry);
+  RUN_TEST(vr, TestNormal);
+  RUN_TEST(vr, TestBrowserNoLauncher);
+  RUN_TEST(vr, TestLauncherNoBrowser);
+  RUN_TEST(vr, TestBrowserLessThanLauncher);
+  RUN_TEST(vr, TestImageTimestampChange);
+  RUN_TEST(vr, TestImageTimestampChangeWhenDisabled);
+  RUN_TEST(vr, TestDisableDueToFailure);
+  RUN_TEST(vr, TestPrefReflection);
+  RUN_TEST(vr, TestTelemetryConfig);
+  RUN_TEST(vr, TestCommitAbort);
+  RUN_TEST(vr, TestDisableDuringLauncherLaunch);
+  RUN_TEST(vr, TestDisableDuringBrowserLaunch);
+  RUN_TEST(vr, TestReEnable);
+
+  return 0;
+}
diff --git a/toolkit/xre/test/win/TestXREMakeCommandLineWin.cpp b/toolkit/xre/test/win/TestXREMakeCommandLineWin.cpp
new file mode 100644
index 0000000000..c12550c3d6
--- /dev/null
+++ b/toolkit/xre/test/win/TestXREMakeCommandLineWin.cpp
@@ -0,0 +1,266 @@
+/* -*- 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 <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+// Support for _setmode
+#include <fcntl.h>
+#include <io.h>
+
+#include "nsWindowsRestart.cpp"
+
+// CommandLineToArgvW may return different values for argv[0] since it contains
+// the path to the binary that was executed so we prepend an argument that is
+// quoted with a space to prevent argv[1] being appended to argv[0].
+#define DUMMY_ARG1 L"\"arg 1\" "
+
+#ifndef MAXPATHLEN
+#  ifdef PATH_MAX
+#    define MAXPATHLEN PATH_MAX
+#  elif defined(MAX_PATH)
+#    define MAXPATHLEN MAX_PATH
+#  elif defined(_MAX_PATH)
+#    define MAXPATHLEN _MAX_PATH
+#  elif defined(CCHMAXPATH)
+#    define MAXPATHLEN CCHMAXPATH
+#  else
+#    define MAXPATHLEN 1024
+#  endif
+#endif
+
+#define TEST_NAME L"XRE MakeCommandLine"
+#define MAX_TESTS 100
+
+// Verbose output can be enabled by defining VERBOSE 1
+#define VERBOSE 0
+
+// Compares compareCmdLine with the output of MakeCommandLine. This is
+// accomplished by converting inCmdLine to an argument list with
+// CommandLineToArgvW and converting it back to a command line with
+// MakeCommandLine.
+static int verifyCmdLineCreation(wchar_t* inCmdLine, wchar_t* compareCmdLine,
+                                 bool passes, int testNum) {
+  int rv = 0;
+  int i;
+  int inArgc;
+  int outArgc;
+  bool isEqual;
+
+  // When debugging with command lines containing Unicode characters greater
+  // than 255 you can set the mode for stdout to Unicode so the console will
+  // receive the correct characters though it won't display them properly unless
+  // the console's font has been set to one that can display the characters. You
+  // can also redirect the console output to a file that has been saved as
+  // Unicode to view the characters.
+  //  _setmode(_fileno(stdout), _O_WTEXT);
+
+  // Prepend an additional argument to the command line. CommandLineToArgvW
+  // handles argv[0] differently than other arguments since argv[0] is the path
+  // to the binary being executed and MakeCommandLine only handles argv[1] and
+  // larger.
+  wchar_t* inCmdLineNew = (wchar_t*)malloc(
+      (wcslen(DUMMY_ARG1) + wcslen(inCmdLine) + 1) * sizeof(wchar_t));
+  wcscpy(inCmdLineNew, DUMMY_ARG1);
+  wcscat(inCmdLineNew, inCmdLine);
+  LPWSTR* inArgv = CommandLineToArgvW(inCmdLineNew, &inArgc);
+
+  auto outCmdLine = mozilla::MakeCommandLine(inArgc - 1, inArgv + 1);
+  wchar_t* outCmdLineNew = (wchar_t*)malloc(
+      (wcslen(DUMMY_ARG1) + wcslen(outCmdLine.get()) + 1) * sizeof(wchar_t));
+  wcscpy(outCmdLineNew, DUMMY_ARG1);
+  wcscat(outCmdLineNew, outCmdLine.get());
+  LPWSTR* outArgv = CommandLineToArgvW(outCmdLineNew, &outArgc);
+
+  if (VERBOSE) {
+    wprintf(L"\n");
+    wprintf(L"Verbose Output\n");
+    wprintf(L"--------------\n");
+    wprintf(L"Input command line   : >%s<\n", inCmdLine);
+    wprintf(L"MakeComandLine output: >%s<\n", outCmdLine.get());
+    wprintf(L"Expected command line: >%s<\n", compareCmdLine);
+
+    wprintf(L"input argc : %d\n", inArgc - 1);
+    wprintf(L"output argc: %d\n", outArgc - 1);
+
+    for (i = 1; i < inArgc; ++i) {
+      wprintf(L"input argv[%d] : >%s<\n", i - 1, inArgv[i]);
+    }
+
+    for (i = 1; i < outArgc; ++i) {
+      wprintf(L"output argv[%d]: >%s<\n", i - 1, outArgv[i]);
+    }
+    wprintf(L"\n");
+  }
+
+  isEqual = (inArgc == outArgc);
+  if (!isEqual) {
+    wprintf(L"TEST-%s-FAIL | %s | ARGC Comparison (check %2d)\n",
+            passes ? L"UNEXPECTED" : L"KNOWN", TEST_NAME, testNum);
+    if (passes) {
+      rv = 1;
+    }
+    LocalFree(inArgv);
+    LocalFree(outArgv);
+    free(inCmdLineNew);
+    free(outCmdLineNew);
+    return rv;
+  }
+
+  for (i = 1; i < inArgc; ++i) {
+    isEqual = (wcscmp(inArgv[i], outArgv[i]) == 0);
+    if (!isEqual) {
+      wprintf(L"TEST-%s-FAIL | %s | ARGV Comparison (check %2d)\n",
+              passes ? L"UNEXPECTED" : L"KNOWN", TEST_NAME, testNum);
+      if (passes) {
+        rv = 1;
+      }
+      LocalFree(inArgv);
+      LocalFree(outArgv);
+      free(inCmdLineNew);
+      free(outCmdLineNew);
+      return rv;
+    }
+  }
+
+  isEqual = (wcscmp(outCmdLine.get(), compareCmdLine) == 0);
+  if (!isEqual) {
+    wprintf(L"TEST-%s-FAIL | %s | Command Line Comparison (check %2d)\n",
+            passes ? L"UNEXPECTED" : L"KNOWN", TEST_NAME, testNum);
+    if (passes) {
+      rv = 1;
+    }
+    LocalFree(inArgv);
+    LocalFree(outArgv);
+    free(inCmdLineNew);
+    free(outCmdLineNew);
+    return rv;
+  }
+
+  if (rv == 0) {
+    if (passes) {
+      wprintf(L"TEST-PASS | %s | check %2d\n", TEST_NAME, testNum);
+    } else {
+      wprintf(L"TEST-UNEXPECTED-PASS | %s | check %2d\n", TEST_NAME, testNum);
+      rv = 1;
+    }
+  }
+
+  LocalFree(inArgv);
+  LocalFree(outArgv);
+  free(inCmdLineNew);
+  free(outCmdLineNew);
+  return rv;
+}
+
+int wmain(int argc, wchar_t* argv[]) {
+  int i;
+  int rv = 0;
+
+  if (argc > 1 && (_wcsicmp(argv[1], L"-check-one") != 0 || argc != 3)) {
+    fwprintf(stderr,
+             L"Displays and validates output from MakeCommandLine.\n\n");
+    fwprintf(stderr, L"Usage: %s -check-one <test number>\n\n", argv[0]);
+    fwprintf(stderr,
+             L"  <test number>\tSpecifies the test number to run from the\n");
+    fwprintf(stderr, L"\t\tTestXREMakeCommandLineWin.ini file.\n");
+    return 255;
+  }
+
+  wchar_t inifile[MAXPATHLEN];
+  if (!::GetModuleFileNameW(0, inifile, MAXPATHLEN)) {
+    wprintf(L"TEST-UNEXPECTED-FAIL | %s | GetModuleFileNameW\n", TEST_NAME);
+    return 2;
+  }
+
+  WCHAR* slash = wcsrchr(inifile, '\\');
+  if (!slash) {
+    wprintf(L"TEST-UNEXPECTED-FAIL | %s | wcsrchr\n", TEST_NAME);
+    return 3;
+  }
+
+  wcscpy(slash + 1, L"TestXREMakeCommandLineWin.ini\0");
+
+  for (i = 0; i < MAX_TESTS; ++i) {
+    wchar_t sInputVal[MAXPATHLEN];
+    wchar_t sOutputVal[MAXPATHLEN];
+    wchar_t sPassesVal[MAXPATHLEN];
+    wchar_t sInputKey[MAXPATHLEN];
+    wchar_t sOutputKey[MAXPATHLEN];
+    wchar_t sPassesKey[MAXPATHLEN];
+
+    if (argc > 2 && _wcsicmp(argv[1], L"-check-one") == 0 && argc == 3) {
+      i = _wtoi(argv[2]);
+    }
+
+    _snwprintf(sInputKey, MAXPATHLEN, L"input_%d", i);
+    _snwprintf(sOutputKey, MAXPATHLEN, L"output_%d", i);
+    _snwprintf(sPassesKey, MAXPATHLEN, L"passes_%d", i);
+
+    if (!GetPrivateProfileStringW(L"MakeCommandLineTests", sInputKey, nullptr,
+                                  sInputVal, MAXPATHLEN, inifile)) {
+      if (i == 0 || (argc > 2 && _wcsicmp(argv[1], L"-check-one") == 0)) {
+        wprintf(L"TEST-UNEXPECTED-FAIL | %s | see following explanation:\n",
+                TEST_NAME);
+        wprintf(
+            L"ERROR: Either the TestXREMakeCommandLineWin.ini file doesn't "
+            L"exist\n");
+        if (argc > 1 && _wcsicmp(argv[1], L"-check-one") == 0 && argc == 3) {
+          wprintf(
+              L"ERROR: or the test is not defined in the MakeCommandLineTests "
+              L"section.\n");
+        } else {
+          wprintf(
+              L"ERROR: or it has no tests defined in the MakeCommandLineTests "
+              L"section.\n");
+        }
+        wprintf(L"ERROR: File: %s\n", inifile);
+        return 4;
+      }
+      break;
+    }
+
+    GetPrivateProfileStringW(L"MakeCommandLineTests", sOutputKey, nullptr,
+                             sOutputVal, MAXPATHLEN, inifile);
+    GetPrivateProfileStringW(L"MakeCommandLineTests", sPassesKey, nullptr,
+                             sPassesVal, MAXPATHLEN, inifile);
+
+    rv |= verifyCmdLineCreation(
+        sInputVal, sOutputVal,
+        (_wcsicmp(sPassesVal, L"false") == 0) ? FALSE : TRUE, i);
+
+    if (argc > 2 && _wcsicmp(argv[1], L"-check-one") == 0) {
+      break;
+    }
+  }
+
+  if (rv == 0) {
+    wprintf(L"TEST-PASS | %s | all checks passed\n", TEST_NAME);
+  } else {
+    wprintf(L"TEST-UNEXPECTED-FAIL | %s | some checks failed\n", TEST_NAME);
+  }
+
+  return rv;
+}
+
+#ifdef __MINGW32__
+
+/* MingW currently does not implement a wide version of the
+   startup routines.  Workaround is to implement something like
+   it ourselves.  See bug 411826 */
+
+#  include <shellapi.h>
+
+int main(int argc, char** argv) {
+  LPWSTR commandLine = GetCommandLineW();
+  int argcw = 0;
+  LPWSTR* argvw = CommandLineToArgvW(commandLine, &argcw);
+  if (!argvw) return 127;
+
+  int result = wmain(argcw, argvw);
+  LocalFree(argvw);
+  return result;
+}
+#endif /* __MINGW32__ */
diff --git a/toolkit/xre/test/win/TestXREMakeCommandLineWin.ini b/toolkit/xre/test/win/TestXREMakeCommandLineWin.ini
new file mode 100644
index 0000000000..17a0413455
--- /dev/null
+++ b/toolkit/xre/test/win/TestXREMakeCommandLineWin.ini
@@ -0,0 +1,103 @@
+; A typical MakeCommandLine test will contain an input and an output name value
+; pair. The value for input_xx is the input command line and the value for
+; output_xx is the expected output command line.
+;
+; A test that is known to fail can be added as follows. If the passes_xx name
+; value pair doesn't exist it defaults to true.
+; input_99=yabadaba
+; output_99=doo
+; passes_99=false
+;
+; If a value starts and ends with single or double quotation marks then it must
+; be enclosed in single or double quotation marks due to GetPrivateProfileString
+; discarding the outmost quotation marks. See GetPrivateProfileString on MSDN
+; for more information.
+; http://msdn.microsoft.com/en-us/library/ms724353.aspx
+
+[MakeCommandLineTests]
+input_0=a:\
+output_0=a:\
+
+input_1=""a:\""
+output_1=a:\"
+
+input_2=""a:\b c""
+output_2=""a:\b c""
+
+input_3=""a:\b c\""
+output_3=""a:\b c\"""
+
+input_4=""a:\b c\d e""
+output_4=""a:\b c\d e""
+
+input_5=""a:\b c\d e\""
+output_5=""a:\b c\d e\"""
+
+input_6=""a:\\""
+output_6=a:\
+
+input_7="a:\" "b:\c d"
+output_7=a:\" "b:\c d"
+
+input_8="a "b:\" "c:\d e""
+output_8="a "b:\" c:\d" e"
+
+input_9="abc" d e
+output_9=abc d e
+
+input_10="a b c" d e
+output_10="a b c" d e
+
+input_11=a\\\b d"e f"g h
+output_11=a\\\b "de fg" h
+
+input_12=a	b
+output_12=a b
+
+input_13=""a	b""
+output_13=""a	b""
+
+input_14=a\\\"b c d
+output_14=a\\\"b c d
+
+input_15=a\\\"b c"
+output_15=a\\\"b c
+
+input_16=""a\\\b c"
+output_16=""a\\\b c""
+
+input_17=\"a
+output_17=\"a
+
+input_18=\\"a
+output_18=\a
+
+input_19=\\"\\\\"a
+output_19=\\\a
+
+input_20=\\"\\\\\"a
+output_20=\\\\\\\"a
+
+input_21="a\\\"b c\" d e
+output_21=""a\\\"b c\" d e""
+
+input_22=a\\\\\"b c" d e"
+output_22=a\\\\\"b "c d e"
+
+input_23=a:\b c\アルファ オメガ\d
+output_23=a:\b c\アルファ オメガ\d
+
+input_24=a:\b "c\アルファ オメガ\d"
+output_24=a:\b "c\アルファ オメガ\d"
+
+input_25=アルファ オメガ
+output_25=アルファ オメガ
+
+input_26=arg1 "" arg3
+output_26=arg1 "" arg3
+
+input_27=""""
+output_27=""""
+
+input_28=""" a """
+output_28=""" a """
diff --git a/toolkit/xre/test/win/mochitest/browser_env_path_long.js b/toolkit/xre/test/win/mochitest/browser_env_path_long.js
new file mode 100644
index 0000000000..9bc63214b0
--- /dev/null
+++ b/toolkit/xre/test/win/mochitest/browser_env_path_long.js
@@ -0,0 +1,16 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/publicdomain/zero/1.0/
+
+// Test that the browser starts even when PATH would expand to a detrimentally
+// long value.
+add_task(async function test() {
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:blank" },
+    function (browser) {
+      ok(
+        true,
+        "Browser should start even with potentially pathologically long PATH."
+      );
+    }
+  );
+});
diff --git a/toolkit/xre/test/win/mochitest/browser_env_path_long.toml b/toolkit/xre/test/win/mochitest/browser_env_path_long.toml
new file mode 100644
index 0000000000..258a903d0c
--- /dev/null
+++ b/toolkit/xre/test/win/mochitest/browser_env_path_long.toml
@@ -0,0 +1,6 @@
+[DEFAULT]
+# This path should expand to >32K characters. See bug 1753910.
+environment = 'PATH="C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;C:/loremipsumdolorsitamet/adipiscingconsectetuerelit/;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%;%PATH%"'
+
+["browser_env_path_long.js"]
+run-if = ["os == 'win'"]
diff --git a/toolkit/xre/test/win/moz.build b/toolkit/xre/test/win/moz.build
new file mode 100644
index 0000000000..fc622f8965
--- /dev/null
+++ b/toolkit/xre/test/win/moz.build
@@ -0,0 +1,55 @@
+# -*- 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/.
+
+BROWSER_CHROME_MANIFESTS += [
+    "mochitest/browser_env_path_long.toml",
+]
+
+GeckoCppUnitTests(
+    [
+        "TestXREMakeCommandLineWin",
+    ],
+    linkage=None,
+)
+
+# This needs to be installed alongside the above unit test.
+FINAL_TARGET_FILES += [
+    "TestXREMakeCommandLineWin.ini",
+]
+
+DEFINES["NS_NO_XPCOM"] = True
+
+LOCAL_INCLUDES += [
+    "/config",
+    "/toolkit/xre",
+]
+
+DisableStlWrapping()
+USE_STATIC_LIBS = True
+
+OS_LIBS += [
+    "advapi32",
+    "comctl32",
+    "ole32",
+    "shell32",
+    "uuid",
+    "userenv",
+    "ws2_32",
+]
+
+if CONFIG["MOZ_LAUNCHER_PROCESS"]:
+    LOCAL_INCLUDES += [
+        "/toolkit/mozapps/update/common",
+    ]
+    GeckoCppUnitTests(
+        [
+            "TestLauncherRegistryInfo",
+        ],
+        linkage=None,
+    )
+    # Needed for TestLauncherRegistryInfo
+    for var in ("MOZ_APP_BASENAME", "MOZ_APP_VENDOR"):
+        DEFINES[var] = '"%s"' % CONFIG[var]
diff --git a/toolkit/xre/test/xpcshell.toml b/toolkit/xre/test/xpcshell.toml
new file mode 100644
index 0000000000..568a72d293
--- /dev/null
+++ b/toolkit/xre/test/xpcshell.toml
@@ -0,0 +1,16 @@
+[DEFAULT]
+tags = "native"
+
+["test_install_hash.js"]
+# Android doesn't ship Subprocess.sys.mjs and debug builds output garbage that the
+# test cannot handle.
+skip-if = [
+  "os == 'android'",
+  "debug",
+]
+support-files = ["show_hash.js"]
+
+["test_launch_without_hang.js"]
+run-sequentially = "Has to launch application binary"
+skip-if = ["os == 'android'"]
+requesttimeoutfactor = 2