XFail Python tests that are intermittent

Author: AutomatedTester

py/test/selenium/webdriver/common/form_handling_tests.py

@@ -23,6 +23,7 @@
 
 class TestFormHandling(object):
 
+    @pytest.mark.xfail_marionette(reason="https://bugzilla.mozilla.org/show_bug.cgi?id=1291320")
     def testShouldClickOnSubmitInputElements(self, driver, pages):
         pages.load("formPage.html")
         driver.find_element_by_id("submitButton").click()

py/test/selenium/webdriver/common/page_loading_tests.py

@@ -95,6 +95,7 @@ def testShouldBeAbleToNavigateBackInTheBrowserHistoryInPresenceOfIframes(self, d
         driver.back()
         assert driver.title == "XHTML Test Page"
 
+    @pytest.mark.xfail_marionette(reason="https://bugzilla.mozilla.org/show_bug.cgi?id=1291320")
     def testShouldBeAbleToNavigateForwardsInTheBrowserHistory(self, driver, pages):
         pages.load("formPage.html")