added uuids to contextualIdentities within MAC for comparison with other browsers

src/js/background/identityState.js

@@ -1,3 +1,4 @@
+/* jshint esversion: 8*/
 const identityState = {
   storageArea: {
     area: browser.storage.local,
@@ -36,6 +37,19 @@ const identityState = {
     return Object.assign({}, tab);
   },
 
+  async getCookieStoreIDuuidMap() {
+    const containers = {};
+    const containerInfo = await identityState.storageArea.area.get();
+    for(const key of Object.keys(containerInfo)) {
+      if (key.includes("identitiesState@@_")) {
+        const container = containerInfo[key];
+        const cookieStoreId = key.replace(/^identitiesState@@_/, "");
+        containers[cookieStoreId] = container.macUUID;
+      }
+    }
+    return containers;
+  },
+
   async storeHidden(cookieStoreId, windowId) {
     const containerState = await this.storageArea.get(cookieStoreId);
     const tabsByContainer = await browser.tabs.query({cookieStoreId, windowId});
@@ -53,10 +67,26 @@ const identityState = {
 
     return this.storageArea.set(cookieStoreId, containerState);
   },
+  async updateUUID(cookieStoreId, uuid) {
+    const containerState = await this.storageArea.get(cookieStoreId);
+    containerState.macUUID = uuid;
+    return this.storageArea.set(cookieStoreId, containerState);
+  },
+  async addUUID(cookieStoreId) {
+    return this.updateUUID(cookieStoreId, uuidv4());
+  },
 
   _createIdentityState() {
     return {
-      hiddenTabs: []
+      hiddenTabs: [],
+      macUUID: uuidv4()
     };
   },
 };
+
+function uuidv4() {
+  // https://stackoverflow.com/questions/105034/create-guid-uuid-in-javascript
+  return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
+    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
+  );
+}