Enable noscript test

TBBTestSuite/TestSuite/BrowserBundleTests.pm

@@ -397,8 +397,6 @@ our @tests = (
         prefs           => {
             'extensions.torbutton.security_slider' => 2,
         },
-        # Bug 28876: temporarily disable test
-        enable          => sub { undef },
     },
     {
         name            => 'fp_screen_dimensions',

marionette/tor_browser_tests/test_noscript.py

@@ -7,7 +7,6 @@ from marionette_harness import MarionetteTestCase
 
 import testsuite
 
-
 class Test(MarionetteTestCase):
 
     def setUp(self):
@@ -21,7 +20,7 @@ class Test(MarionetteTestCase):
 
 
     def test_noscript(self):
-        self.marionette.set_search_timeout(1000)
+        self.marionette.timeout.implicit = 1
 
         with self.marionette.using_context('content'):