--- a/toolkit/mozapps/extensions/content/extensions.js
+++ b/toolkit/mozapps/extensions/content/extensions.js
@@ -3756,16 +3756,17 @@ var gDetailView = {
   },
 
   async createOptionsBrowser(parentNode) {
     let browser = document.createElement("browser");
     browser.setAttribute("type", "content");
     browser.setAttribute("disableglobalhistory", "true");
     browser.setAttribute("id", "addon-options");
     browser.setAttribute("class", "inline-options-browser");
+    browser.setAttribute("transparent", "true");
     browser.setAttribute("forcemessagemanager", "true");
     browser.setAttribute("selectmenulist", "ContentSelectDropdown");
 
     // The outer about:addons document listens for key presses to focus
     // the search box when / is pressed.  But if we're focused inside an
     // options page, don't let those keypresses steal focus.
     browser.addEventListener("keypress", event => {
       event.stopPropagation();