One more addition to run instructions.

Author: juj

README

@@ -129,7 +129,8 @@ This github repository adds Emscripten testing harness for pthreads. To run the
 
 1. Adjust the Firefox Nightly pref dom.workers.maxPerDomain in about:config to at least 40 to allow that many simultaneous threads to run (some tests need it)
 2. Prepare Firefox Nightly prefs to be emrun-friendly by setting http://kripken.github.io/emscripten-site/docs/compiling/Running-html-files-with-emrun.html#running-web-pages-in-firefox
-3. Add directory posixtestsuite/emcc/ to PATH.
-4. Navigate to posixtestsuite/conformance/interfaces/ as the current directory.
-5. Make sure to close all existing instanced of Firefox tabs and processes, because the test runner will forcibly terminate browser processes during the run.
-6. Run 'run_all_tests.py'
+3. Edit the file posixtestsuite/emcc/run_emcc_tests.py and configure the --browser=xx directive in the invocation of the 'emrun' cmd (line 24) to point to your pthreads-enabled Firefox Nightly build.
+4. Add directory posixtestsuite/emcc/ to PATH.
+5. Navigate to posixtestsuite/conformance/interfaces/ as the current directory.
+6. Make sure to close all existing instanced of Firefox tabs and processes, because the test runner will forcibly terminate browser processes during the run.
+7. Run 'run_all_tests.py'