From 9cfc2ff6f809dec1a89d6ff93bc97698450e2b6b Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Sun, 24 Jan 2016 08:52:32 -0500
Subject: [PATCH] this fixes https://github.com/gorhill/uBlock/issues/763

---
 platform/firefox/vapi-background.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/platform/firefox/vapi-background.js b/platform/firefox/vapi-background.js
index d4bf94a..286a9eb 100644
--- a/platform/firefox/vapi-background.js
+++ b/platform/firefox/vapi-background.js
@@ -2422,7 +2422,10 @@ vAPI.toolbarButton = {
             break;
         }
 
-        if ( document.getElementById(tbb.id) !== null ) {
+        // https://github.com/gorhill/uBlock/issues/763
+        // We are done if our toolbar button is already installed in one of the
+        // toolbar.
+        if ( palette !== null && toolbarButton.parentElement !== palette ) {
             return;
         }