Update status for windows ie11 and firefox tests

tests/language/language_dart2js.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 [ $compiler == dart2js ]
 getter_setter_in_lib_test: Fail # Issue 23288
 method_name_test: Fail # issue 25574
 setter4_test: CompileTimeError # issue 13639
 
 async_star_cancel_while_paused_test: RuntimeError # Issue 22853
@@ skipping 248 matching lines @@
 
 [ $compiler == dart2js && ($runtime == safari || $runtime == safarimobilesim)]
 round_test: Fail, OK # Common JavaScript engine Math.round bug.
 
 [ $compiler == dart2js && $runtime == ff ]
 round_test: Pass, Fail, OK # Fixed in ff 35. Common JavaScript engine Math.round bug.
 
 [ $compiler == dart2js && $runtime == chrome && $system == macos ]
 await_future_test: Pass, Timeout # Issue 26735
 
-[ $compiler == dart2js && $runtime == chrome && $system == windows ]
+[ $compiler == dart2js && ($runtime == chrome || $runtime == ff) && $system == windows ]
 string_literals_test: RuntimeError # Issue 27533
 
 [ $compiler == dart2js && ($runtime == safari || $runtime == safarimobilesim)]
 # Safari codegen bug, fixed on some versions of Safari 7.1 (Version 7.1 (9537.85.10.17.1))
 call_through_getter_test: Fail, OK
 
 [ $compiler == dart2js && $runtime == chromeOnAndroid ]
 override_field_test/02: Pass, Slow # TODO(kasperl): Please triage.
 
 [ $minified ]
@@ skipping 85 matching lines @@
 try_finally_regress_25333_test: Crash # Issue 24485
 
 [ $compiler == dart2js && $cps_ir && $checked ]
 *: Skip # `assert` not implemented
 
 [ $compiler == dart2js && $host_checked ]
 regress_26855_test/1: Crash # Issue 26867
 regress_26855_test/2: Crash # Issue 26867
 regress_26855_test/3: Crash # Issue 26867
 regress_26855_test/4: Crash # Issue 26867