--- a/browser/modules/ExtensionsUI.jsm
+++ b/browser/modules/ExtensionsUI.jsm
@@ -169,38 +169,38 @@ this.ExtensionsUI = {
     let win = target.ownerGlobal;
 
     let name = info.addon.name;
     if (name.length > 50) {
       name = name.slice(0, 49) + "…";
     }
     name = this._sanitizeName(name);
 
-    let addonLabel = `<label class="addon-webext-name">${name}</label>`;
+    let addonName = `<span class="addon-webext-name">${name}</span>`;
     let bundle = win.gNavigatorBundle;
 
-    let header = bundle.getFormattedString("webextPerms.header", [addonLabel]);
+    let header = bundle.getFormattedString("webextPerms.header", [addonName]);
     let text = "";
     let listIntro = bundle.getString("webextPerms.listIntro");
 
     let acceptText = bundle.getString("webextPerms.add.label");
     let acceptKey = bundle.getString("webextPerms.add.accessKey");
     let cancelText = bundle.getString("webextPerms.cancel.label");
     let cancelKey = bundle.getString("webextPerms.cancel.accessKey");
 
     if (info.type == "sideload") {
-      header = bundle.getFormattedString("webextPerms.sideloadHeader", [addonLabel]);
+      header = bundle.getFormattedString("webextPerms.sideloadHeader", [addonName]);
       text = bundle.getString("webextPerms.sideloadText");
       acceptText = bundle.getString("webextPerms.sideloadEnable.label");
       acceptKey = bundle.getString("webextPerms.sideloadEnable.accessKey");
       cancelText = bundle.getString("webextPerms.sideloadDisable.label");
       cancelKey = bundle.getString("webextPerms.sideloadDisable.accessKey");
     } else if (info.type == "update") {
       header = "";
-      text = bundle.getFormattedString("webextPerms.updateText", [addonLabel]);
+      text = bundle.getFormattedString("webextPerms.updateText", [addonName]);
       acceptText = bundle.getString("webextPerms.updateAccept.label");
       acceptKey = bundle.getString("webextPerms.updateAccept.accessKey");
     }
 
     let msgs = [];
     for (let permission of perms.permissions) {
       let key = `webextPerms.description.${permission}`;
       if (permission == "nativeMessaging") {
@@ -316,26 +316,26 @@ this.ExtensionsUI = {
     });
   },
 
   showInstallNotification(target, addon) {
     let win = target.ownerGlobal;
     let popups = win.PopupNotifications;
 
     let name = this._sanitizeName(addon.name);
-    let addonLabel = `<label class="addon-webext-name">${name}</label>`;
+    let addonName = `<span class="addon-webext-name">${name}</span>`;
     let addonIcon = '<image class="addon-addon-icon"/>';
     let toolbarIcon = '<image class="addon-toolbar-icon"/>';
 
     let brandBundle = win.document.getElementById("bundle_brand");
     let appName = brandBundle.getString("brandShortName");
 
     let bundle = win.gNavigatorBundle;
     let msg1 = bundle.getFormattedString("addonPostInstall.message1",
-                                         [addonLabel, appName]);
+                                         [addonName, appName]);
     let msg2 = bundle.getFormattedString("addonPostInstall.messageDetail",
                                          [addonIcon, toolbarIcon]);
 
     return new Promise(resolve => {
       let action = {
         label: bundle.getString("addonPostInstall.okay.label"),
         accessKey: bundle.getString("addonPostInstall.okay.key"),
         callback: resolve,

--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -833,16 +833,17 @@ menuitem.bookmark-item {
   font-weight: bold;
 }
 
 .addon-webext-perm-header {
   font-size: 1.3em;
 }
 
 .addon-webext-name {
+  display: inline;
   font-weight: bold;
   margin: 0;
 }
 
 .addon-addon-icon {
   width: 14px;
   height: 14px;
   list-style-image: url("chrome://browser/skin/menuPanel.svg");

--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -3091,16 +3091,17 @@ menulist.translate-infobar-element > .me
   font-weight: bold;
 }
 
 .addon-webext-perm-header {
   font-size: 1.3em;
 }
 
 .addon-webext-name {
+  display: inline;
   font-weight: bold;
   margin: 0;
 }
 
 .addon-addon-icon {
   width: 14px;
   height: 14px;
   list-style-image: url("chrome://browser/skin/menuPanel.svg");

--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -2136,16 +2136,17 @@ toolbarbutton.bookmark-item[dragover="tr
   font-weight: bold;
 }
 
 .addon-webext-perm-header {
   font-size: 1.3em;
 }
 
 .addon-webext-name {
+  display: inline;
   font-weight: bold;
   margin: 0;
 }
 
 .addon-addon-icon {
   width: 14px;
   height: 14px;
   list-style-image: url("chrome://browser/skin/menuPanel.svg");