--- a/Makefile.in
+++ b/Makefile.in
@@ -61,16 +61,21 @@ tier_base_dirs = \
 	build \
 	probes \
 	$(NULL)
 
 ifdef MOZ_MEMORY
 tier_base_dirs += memory/jemalloc
 endif
 
+ifdef ENABLE_TESTS
+# Additional makefile targets to call automated test suites
+include $(topsrcdir)/testing/testsuite-targets.mk
+endif
+
 include $(topsrcdir)/$(MOZ_BUILD_APP)/build.mk
 
 TIERS += testharness
 
 # test harnesses
 ifdef ENABLE_TESTS
 tier_testharness_dirs += tools/test-harness
 endif

--- a/browser/build.mk
+++ b/browser/build.mk
@@ -54,8 +54,19 @@ tier_app_dirs += browser
 installer:
 	@$(MAKE) -C browser/installer installer
 
 package:
 	@$(MAKE) -C browser/installer
 
 install::
 	@$(MAKE) -C browser/installer install
+
+ifdef ENABLE_TESTS
+# Implemented in testing/testsuite-targets.mk
+mochitest-browser-chrome:
+	$(RUN_MOCHITEST) --browser-chrome
+	$(CHECK_TEST_ERROR)
+
+mochitest:: mochitest-browser-chrome
+
+.PHONY: mochitest-browser-chrome
+endif

--- a/testing/mochitest/runtests.py.in
+++ b/testing/mochitest/runtests.py.in
@@ -326,25 +326,28 @@ Are you executing $objdir/_tests/testing
       urlOpts.append("testPath=" + encodeURIComponent(options.testPath))
   elif options.a11y:
     testURL = A11YTESTS_URL
     if options.testPath:
       urlOpts.append("testPath=" + encodeURIComponent(options.testPath))
   elif options.browserChrome:
     testURL = "about:blank"
 
+  # allow relative paths for logFile
+  if options.logFile:
+    options.logFile = os.path.normpath(os.path.join(oldcwd, options.logFile))
   if options.browserChrome:
     makeTestConfig(options)
   else:
     if options.autorun:
       urlOpts.append("autorun=1")
     if options.closeWhenDone:
       urlOpts.append("closeWhenDone=1")
     if options.logFile:
-      urlOpts.append("logFile=" + encodeURIComponent(os.path.normpath(os.path.join(oldcwd, options.logFile))))
+      urlOpts.append("logFile=" + encodeURIComponent(options.logFile))
       urlOpts.append("fileLevel=" + encodeURIComponent(options.fileLevel))
     if options.consoleLevel:
       urlOpts.append("consoleLevel=" + encodeURIComponent(options.consoleLevel))
     if len(urlOpts) > 0:
       testURL += "?" + "&".join(urlOpts)
 
   browserEnv["XPCOM_MEM_BLOAT_LOG"] = LEAK_REPORT_FILE