--- a/mobile/android/chrome/content/aboutAddons.js
+++ b/mobile/android/chrome/content/aboutAddons.js
@@ -354,17 +354,21 @@ var Addons = {
     let optionsURL = aListItem.getAttribute("optionsURL");
 
     // Always clean the options content before rendering the options of the
     // newly selected extension.
     optionsBox.innerHTML = "";
 
     switch (parseInt(addon.optionsType)) {
       case AddonManager.OPTIONS_TYPE_INLINE_BROWSER:
-        this.createWebExtensionOptions(optionsBox, optionsURL, addon.optionsBrowserStyle);
+        // WebExtensions are loaded asynchronously and the optionsURL
+        // may not be available via listitem when the add-on has just been
+        // installed, but it is available on the addon if one is set.
+        detailItem.setAttribute("optionsURL", addon.optionsURL);
+        this.createWebExtensionOptions(optionsBox, addon.optionsURL, addon.optionsBrowserStyle);
         break;
       case AddonManager.OPTIONS_TYPE_INLINE:
         this.createInlineOptions(optionsBox, optionsURL, aListItem);
         break;
     }
 
     showAddonOptions();
   },