--- a/toolkit/mozapps/extensions/test/browser/browser_gmpProvider.js
+++ b/toolkit/mozapps/extensions/test/browser/browser_gmpProvider.js
@@ -238,31 +238,16 @@ add_task(async function testInstalledDet
     let el = doc.getElementsByClassName("disabled-postfix")[0];
     is_element_hidden(el, "disabled-postfix is hidden.");
     el = doc.getElementById("detail-findUpdates-btn");
     is_element_visible(el, "Find updates link is visible.");
     el = doc.getElementById("detail-warning");
     is_element_hidden(el, "Warning notification is hidden.");
     el = doc.getElementsByTagName("setting")[0];
 
-    let contextMenu = doc.getElementById("addonitem-popup");
-    await new Promise(resolve => {
-      let listener = () => {
-        contextMenu.removeEventListener("popupshown", listener);
-        resolve();
-      };
-      contextMenu.addEventListener("popupshown", listener);
-      el = doc.getElementsByClassName("detail-view-container")[0];
-      EventUtils.synthesizeMouse(el, 4, 4, { }, gManagerWindow);
-      EventUtils.synthesizeMouse(el, 4, 4, { type: "contextmenu", button: 2 }, gManagerWindow);
-    });
-    let menuSep = doc.getElementById("addonitem-menuseparator");
-    is_element_hidden(menuSep, "Menu separator is hidden.");
-    contextMenu.hidePopup();
-
     await gCategoryUtilities.openType("plugin");
   }
 });
 
 add_task(async function testInstalledGlobalEmeDisabled() {
   gPrefs.setBoolPref(GMPScope.GMPPrefs.KEY_EME_ENABLED, false);
   for (let addon of gMockAddons) {
     let item = get_addon_element(gManagerWindow, addon.id);