diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index cab6f3f184ec..1a0c89ee418a 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -7327,12 +7327,19 @@ var gIdentityHandler = {
     label.setAttribute("flex", "1");
     label.setAttribute("class", "identity-popup-permission-label");
     label.setAttribute("control", menulist.getAttribute("id"));
-    label.setAttribute("value", SitePermissions.getPermissionLabel(aPermission));
+    label.textContent = SitePermissions.getPermissionLabel(aPermission);
 
     let container = document.createElement("hbox");
     container.setAttribute("align", "center");
     container.appendChild(label);
     container.appendChild(menulist);
+
+    // The menuitem text can be long and we don't want the dropdown
+    // to expand to the width of unselected labels.
+    // Need to set this attribute after it's appended, otherwise it gets
+    // overridden with sizetopopup="pref".
+    menulist.setAttribute("sizetopopup", "none");
+
     return container;
   }
 };
diff --git a/browser/base/content/test/general/browser_permissions.js b/browser/base/content/test/general/browser_permissions.js
index ed612cc0eafc..87a8d3b4ba94 100644
--- a/browser/base/content/test/general/browser_permissions.js
+++ b/browser/base/content/test/general/browser_permissions.js
@@ -30,6 +30,11 @@ add_task(function* testMainViewVisible() {
   gIdentityHandler._identityBox.click();
   ok(is_hidden(emptyLabel), "List of permissions is not empty");
 
+  let labelText = SitePermissions.getPermissionLabel("install");
+  let labels = permissionsList.querySelectorAll(".identity-popup-permission-label");
+  is(labels.length, 1, "One permission visible in main view");
+  is(labels[0].textContent, labelText, "Correct value");
+
   let menulists = permissionsList.querySelectorAll("menulist");
   is(menulists.length, 1, "One permission visible in main view");
   is(menulists[0].id, "identity-popup-permission:install", "Install permission visible");
diff --git a/browser/themes/shared/controlcenter/panel.inc.css b/browser/themes/shared/controlcenter/panel.inc.css
index f56c8ea4c6f8..b5cc4cdb2f31 100644
--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ b/browser/themes/shared/controlcenter/panel.inc.css
@@ -289,6 +289,10 @@ description#identity-popup-content-verifier,
   background-image: url(chrome://browser/skin/controlcenter/permissions.svg);
 }
 
+#identity-popup-permission-list menulist {
+  min-width: 60px;
+}
+
 #identity-popup-permission-list:not(:empty) {
   margin-top: 5px;
 }
@@ -299,5 +303,6 @@ description#identity-popup-content-verifier,
 
 .identity-popup-permission-label {
   -moz-margin-start: 0;
+  word-wrap: break-word;
 }