Backed out changeset 0124edce0553 (bug 1312436)

browser/base/content/test/general/browser.ini

@@ -399,6 +399,7 @@ run-if = e10s
 [browser_tab_detach_restore.js]
 [browser_tab_drag_drop_perwindow.js]
 [browser_tab_dragdrop.js]
+skip-if = buildapp == 'mulet' || (e10s && debug) # Bug 1312436
 [browser_tab_dragdrop2.js]
 [browser_tabbar_big_widgets.js]
 skip-if = os == "linux" || os == "mac" # No tabs in titlebar on linux