bugfix: change firefox -> zen for store name

Author: lbrooney

src/toolkit/components/extensions/parent/ext-toolkit-js.patch

@@ -0,0 +1,17 @@
+diff --git a/toolkit/components/extensions/parent/ext-toolkit.js b/toolkit/components/extensions/parent/ext-toolkit.js
+index c672cb96c0..e8226e7802 100644
+--- a/toolkit/components/extensions/parent/ext-toolkit.js
++++ b/toolkit/components/extensions/parent/ext-toolkit.js
+@@ -35,9 +35,9 @@ global.EventManager = ExtensionCommon.EventManager;
+
+ /* globals DEFAULT_STORE, PRIVATE_STORE, CONTAINER_STORE */
+
+-global.DEFAULT_STORE = "firefox-default";
+-global.PRIVATE_STORE = "firefox-private";
+-global.CONTAINER_STORE = "firefox-container-";
++global.DEFAULT_STORE = "zen-default";
++global.PRIVATE_STORE = "zen-private";
++global.CONTAINER_STORE = "zen-container-";
+
+ global.getCookieStoreIdForTab = function (data, tab) {
+   if (data.incognito) {