Update status for ff + jsshell list_test

tests/corelib/corelib.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.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 bool_from_environment2_test: Skip
 bool_from_environment_test: Skip
 from_environment_const_type_test: Skip
 from_environment_const_type_undefined_test: Skip
 int_from_environment2_test: Skip
@@ skipping 64 matching lines @@
 # IEEE-754 rounding algorithm.
 double_parse_test/02: Fail, OK
 
 [ $runtime == safari || $runtime == safarimobilesim ]
 double_round3_test: Fail, OK # Runtime rounds 0.49999999999999994 to 1.
 double_round_to_double2_test: Fail, OK # Runtime rounds 0.49999999999999994 to 1.
 
 [ $runtime == ff ]
 double_round3_test: Pass, Fail, OK # Fails on ff 34, passes on ff 35. Runtime rounds 0.49999999999999994 to 1.
 double_round_to_double2_test: Pass, Fail, OK # Fails on ff 34, passes on ff 35. Runtime rounds 0.49999999999999994 to 1.
-list_test/none: RuntimeError # Issue 27871
-list_test/01: RuntimeError # Issue 27871
 
 [ $compiler == dart2js && $runtime == drt && $csp && $minified ]
 core_runtime_types_test: Pass, Fail # Issue 27913
 
 [ $compiler == dart2js ]
 error_stack_trace1_test: RuntimeError # Issue 12399
 hash_set_test/01: RuntimeError # Issue 11551
 integer_to_string_test/01: RuntimeError # Issue 1533
 iterable_return_type_test/01: RuntimeError # Issue 20085
 iterable_return_type_test/02: RuntimeError # Dart2js does not support Uint64*.
@@ skipping 19 matching lines @@
 [ $compiler == dart2js && $runtime == safarimobilesim ]
 list_test/01: Fail # Safari bug: Array(-2) seen as dead code.
 string_trimlr_test/none: Fail
 
 [ $compiler == dart2js && $runtime == ie10 ]
 string_case_test/01: Fail, OK  # Bug in IE.
 string_case_test/02: Fail, OK  # Bug in IE.
 
 [ $compiler == dart2js && ($runtime == ff || $runtime == jsshell) ]
 string_case_test/01: Fail, OK  # Bug in Firefox.
-list_test/none: Fail # Issue 28014
-list_test/01: Fail # Issue 28014
 int_parse_radix_test/none: Pass, RuntimeError # Issue 28983
 string_trim2_test: Pass, RuntimeError # Issue 28983
 string_trimlr_test/01: Pass, RuntimeError # Issue 28983
 string_trimlr_test/none: Pass, RuntimeError # Issue 28983
 double_parse_test/03: Pass, RuntimeError # Issue 28983
 double_parse_test/none: Pass, RuntimeError # Issue 28983
 num_parse_test/01: Pass, RuntimeError # Issue 28983
 num_parse_test/none: Pass, RuntimeError # Issue 28983
 
+[ $compiler == dart2js && ($runtime == ff || $runtime == jsshell) && $fast_startup == false]
+list_test/none: RuntimeError # Issue 27871, Issue 28014, proably Bug in jsshell / Firefox
+list_test/01: RuntimeError # Issue 27871, Issue 28014, proably Bug in jsshell / Firefox
+
 [ $compiler == dart2js && $runtime == dartium ]
 string_case_test/02: Fail, OK  # Bug in dartium version of V8.
 string_case_test/03: Fail, OK  # Bug in dartium version of V8.
 
 # Analyzer's implementation of fromEnvironment assumes that undefined
 # environment variables have an unspecified value (rather than being
 # null) because it is expected that the user will supply a value when
 # the code is run.  This means that it produces slightly different
 # error messages than the VM and Dart2js.
 [ $compiler == dart2analyzer && $checked ]
@@ skipping 108 matching lines @@
 symbol_reserved_word_test/12: RuntimeError # Issue 27394
 symbol_test/none: RuntimeError # Issue 27394
 uri_example_test: RuntimeError # Issue 27394
 uri_http_test: RuntimeError # Issue 27394
 uri_parameters_all_test: RuntimeError # Issue 27394
 uri_query_test: RuntimeError # Issue 27394
 uri_test: RuntimeError # Issue 27394
 
 [ $compiler == dart2js && $dart2js_with_kernel && $host_checked ]
 regress/4562_test/01: Crash # Issue 27394