--- a/toolkit/mozapps/handling/content/dialog.js
+++ b/toolkit/mozapps/handling/content/dialog.js
@@ -116,17 +116,17 @@ var dialog = {
       elm.obj = app;
 
       if (app instanceof Ci.nsILocalHandlerApp) {
         // See if we have an nsILocalHandlerApp and set the icon
         let uri = ios.newFileURI(app.executable);
         elm.setAttribute("image", "moz-icon://" + uri.spec + "?size=32");
       } else if (app instanceof Ci.nsIWebHandlerApp) {
         let uri = ios.newURI(app.uriTemplate);
-        if (/^https?/.test(uri.scheme)) {
+        if (/^https?$/.test(uri.scheme)) {
           // Unfortunately we can't use the favicon service to get the favicon,
           // because the service looks for a record with the exact URL we give
           // it, and users won't have such records for URLs they don't visit,
           // and users won't visit the handler's URL template, they'll only
           // visit URLs derived from that template (i.e. with %s in the template
           // replaced by the URL of the content being handled).
           elm.setAttribute("image", uri.prePath + "/favicon.ico");
         }