--- a/dom/html/test/mochitest.ini
+++ b/dom/html/test/mochitest.ini
@@ -459,17 +459,17 @@ skip-if = (toolkit == 'gonk' && debug) #
 [test_embed_attributes_reflection.html]
 [test_formData.html]
 [test_formSubmission.html]
 skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) b2g-debug(NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) b2g-desktop(NS_ERROR_FILE_TARGET_DOES_NOT_EXIST)
 [test_formSubmission2.html]
 skip-if = toolkit == 'android'
 [test_formelements.html]
 [test_fullscreen-api.html]
-skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' || e10s #TIMED_OUT # b2g(time out, some kind of focus issue) b2g-debug(time out, some kind of focus issue) b2g-desktop(time out, some kind of focus issue)
+skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' # b2g(time out, some kind of focus issue) b2g-debug(time out, some kind of focus issue) b2g-desktop(time out, some kind of focus issue)
 [test_fullscreen-api-race.html]
 skip-if = buildapp == 'b2g' || toolkit == 'android' || toolkit == 'cocoa' || e10s # just copy the conditions from the test above
 [test_hidden.html]
 [test_html_attributes_reflection.html]
 [test_htmlcollection.html]
 [test_iframe_sandbox_general.html]
 skip-if = (buildapp == 'b2g' && toolkit != 'gonk') #Bug 931116, b2g desktop specific, initial triage
 [test_iframe_sandbox_inheritance.html]