diff --git a/src/js/popup.js b/src/js/popup.js
index 11ad0ca..b7b974c 100644
--- a/src/js/popup.js
+++ b/src/js/popup.js
@@ -1867,13 +1867,23 @@ Logic.registerPanel(P_CONTAINER_EDIT, {
   },
 
   async _addSite() {
+    // Get URL and container ID from form
     const formValues = new FormData(this._editForm);
     const url = formValues.get("site-name");
     const userContextId = formValues.get("container-id");
     const currentTab = await Logic.currentTab();
     const tabId = currentTab.id;
     const fullURL = this.checkUrl(url);
-    Logic.setOrRemoveAssignment(tabId, fullURL, userContextId, false);
+
+    // Assign URL to container
+    await Logic.setOrRemoveAssignment(tabId, fullURL, userContextId, false);
+
+    // Clear form
+    document.querySelector("#edit-container-panel-site-input").value = "";
+
+    // Show new assignments
+    const assignments = await Logic.getAssignmentObjectByContainer(userContextId);
+    this.showAssignedContainers(assignments);
   },
 
   checkUrl(url){
@@ -1997,7 +2007,8 @@ Logic.registerPanel(P_CONTAINER_EDIT, {
     });
     // Only show ability to add site if it's an existing container
     document.querySelector("#edit-container-panel-add-site").hidden = !userContextId;
-
+    // Make site input empty
+    document.querySelector("#edit-container-panel-site-input").value = "";
     document.querySelector("#edit-container-panel-name-input").value = identity.name || "";
     document.querySelector("#edit-container-panel-usercontext-input").value = userContextId || NEW_CONTAINER_ID;
     const containerName = document.querySelector("#edit-container-panel-name-input");