diff --git a/src/js/background/backgroundLogic.js b/src/js/background/backgroundLogic.js
index 6eef30e..30d0d55 100644
--- a/src/js/background/backgroundLogic.js
+++ b/src/js/background/backgroundLogic.js
@@ -32,6 +32,10 @@ const backgroundLogic = {
       await browser.contextualIdentities.remove(this.cookieStoreId(userContextId));
     }
     assignManager.deleteContainer(userContextId);
+
+    // Now remove the identity->proxy association in proxifiedContainers also
+    proxifiedContainers.delete(this.cookieStoreId(userContextId));
+
     return {done: true, userContextId};
   },
 
diff --git a/src/js/proxified-containers.js b/src/js/proxified-containers.js
index 1cd0b01..909996a 100644
--- a/src/js/proxified-containers.js
+++ b/src/js/proxified-containers.js
@@ -148,17 +148,17 @@ proxifiedContainers = {
     }
   },
 
-  //Deletes the proxy information object for a specified cookieStoreId [useful for cleaning]
+  // Deletes the proxy information object for a specified cookieStoreId [useful for cleaning]
   delete(cookieStoreId) {
     return new Promise((resolve, reject) => {
       // Assumes proxy is a properly formatted object
       proxifiedContainers.retrieve().then((proxifiedContainersStore) => {
-        let index = proxifiedContainersStore.findIndex(i => i.cookieStoreId === cookieStoreId);
+        const index = proxifiedContainersStore.findIndex(i => i.cookieStoreId === cookieStoreId);
 
         if (index === -1) {
           reject({error: "not-found", message: `Container '${cookieStoreId}' not found.`});
         } else {
-          delete proxifiedContainersStore[index];
+          proxifiedContainersStore.splice(index, 1);
         }
 
         browser.storage.local.set({