diff --git a/dom/tests/mochitest/general/mochitest.ini b/dom/tests/mochitest/general/mochitest.ini
index ce316172e524..95fabaa281b7 100644
--- a/dom/tests/mochitest/general/mochitest.ini
+++ b/dom/tests/mochitest/general/mochitest.ini
@@ -1,5 +1,4 @@
 [DEFAULT]
-skip-if = e10s
 support-files =
   497633.html
   file_MozEnteredDomFullscreen.html
@@ -35,7 +34,7 @@ support-files =
   resource_timing.js
 
 [test_497898.html]
-skip-if = (buildapp == 'b2g' && toolkit != 'gonk') || toolkit == 'android' #Bug 931116, b2g desktop specific, initial triage
+skip-if = ((buildapp == 'mulet' || buildapp == 'b2g') && toolkit != 'gonk') || toolkit == 'android' #Bug 931116, b2g desktop specific, initial triage
 [test_bug504220.html]
 [test_bug628069_1.html]
 skip-if = (buildapp == 'b2g' && toolkit != 'gonk') #Bug 931116, b2g desktop specific, initial triage
@@ -46,7 +45,7 @@ skip-if = (buildapp == 'b2g' && toolkit != 'gonk') #Bug 931116, b2g desktop spec
 [test_bug861217.html]
 [test_clientRects.html]
 [test_clipboard_events.html]
-skip-if = buildapp == 'b2g' # b2g(clipboard undefined) b2g-debug(clipboard undefined) b2g-desktop(clipboard undefined)
+skip-if = e10s || buildapp == 'b2g' # b2g(clipboard undefined) b2g-debug(clipboard undefined) b2g-desktop(clipboard undefined)
 [test_consoleAPI.html]
 [test_DOMMatrix.html]
 [test_domWindowUtils.html]
@@ -56,12 +55,12 @@ skip-if = buildapp == 'b2g' # b2g(clipboard undefined) b2g-debug(clipboard undef
 skip-if = buildapp == 'mulet'
 [test_focus_legend_noparent.html]
 [test_focusrings.xul]
-skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT
+skip-if = e10s || buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT
 [test_for_of.html]
 [test_frameElementWrapping.html]
 [test_framedhistoryframes.html]
 [test_idleapi_permissions.html]
-skip-if = buildapp == 'b2g' || buildapp == 'mulet'
+skip-if = e10s || buildapp == 'b2g' || buildapp == 'mulet'
 [test_interfaces.html]
 skip-if = ((buildapp == 'mulet' || buildapp == 'b2g') && toolkit != 'gonk') #Bug 931116, b2g desktop specific, initial triage
 # [test_network_events.html]
@@ -75,13 +74,13 @@ skip-if = buildapp == 'mulet'
 skip-if = buildapp == 'mulet'
 [test_picture_pref.html]
 [test_resource_timing.html]
-skip-if = buildapp == 'b2g' || buildapp == 'mulet' # b2g(No clipboard) b2g-debug(No clipboard) b2g-desktop(No clipboard)
+skip-if = buildapp == 'b2g' || buildapp == 'mulet'
 [test_resource_timing_cross_origin.html]
 skip-if = buildapp == 'b2g' || buildapp == 'mulet'
 [test_performance_now.html]
 [test_srcset_pref.html]
 [test_showModalDialog.html]
-skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' #Don't run modal tests on Android # b2g(showmodaldialog) b2g-debug(showmodaldialog) b2g-desktop(showmodaldialog)
+skip-if = e10s || buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' #Don't run modal tests on Android # b2g(showmodaldialog) b2g-debug(showmodaldialog) b2g-desktop(showmodaldialog)
 [test_stylesheetPI.html]
 [test_vibrator.html]
 skip-if = buildapp == 'mulet' || toolkit == 'android' #CRASH_SUTAGENT
diff --git a/dom/tests/mochitest/general/test_resource_timing.html b/dom/tests/mochitest/general/test_resource_timing.html
index 16c8ead9e995..febd9f5ca81e 100644
--- a/dom/tests/mochitest/general/test_resource_timing.html
+++ b/dom/tests/mochitest/general/test_resource_timing.html
@@ -20,12 +20,15 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=822480
 SimpleTest.waitForExplicitFinish();
 
 // Resource timing is prefed off by default, so we had to use this workaround
-SpecialPowers.setBoolPref("dom.enable_resource_timing", true);
-var subwindow = window.open("resource_timing_main_test.html");
+SpecialPowers.pushPrefEnv({"set": [["dom.enable_resource_timing", true]]}, start);
+var subwindow = null;
+
+function start() {
+  subwindow = window.open("resource_timing_main_test.html");
+}
 
 function finishTests() {
   subwindow.close();
-  SpecialPowers.setBoolPref("dom.enable_resource_timing", false);
   SimpleTest.finish();
 }
 </script>