From b0072eab57d44fad5b6ccb2bca230a0b2d97564c Mon Sep 17 00:00:00 2001
From: Sean Rand <asanernd@gmail.com>
Date: Mon, 3 Aug 2015 01:15:50 +0200
Subject: [PATCH] try/catch createShadowRoot in contentscripts

---
 src/js/contentscript-end.js   | 7 ++++++-
 src/js/contentscript-start.js | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/js/contentscript-end.js b/src/js/contentscript-end.js
index 5a3f99dcd..88726b406 100644
--- a/src/js/contentscript-end.js
+++ b/src/js/contentscript-end.js
@@ -470,7 +470,12 @@ var uBlockCollapser = (function() {
             if ( shadow !== null && shadow.className === sessionId ) {
                 continue;
             }
-            shadow = elem.createShadowRoot();
+            // not all nodes can be shadowed
+            try {
+                shadow = elem.createShadowRoot();
+            } catch (ex) {
+                continue;
+            }
             shadow.className = sessionId;
         }
     };
diff --git a/src/js/contentscript-start.js b/src/js/contentscript-start.js
index 892eea8cc..279d234c2 100644
--- a/src/js/contentscript-start.js
+++ b/src/js/contentscript-start.js
@@ -181,7 +181,12 @@ var hideElements = function(selectors) {
         if ( shadow !== null && shadow.className === sessionId ) {
             continue;
         }
-        shadow = elem.createShadowRoot();
+            // not all nodes can be shadowed
+            try {
+                shadow = elem.createShadowRoot();
+            } catch (ex) {
+                continue;
+            }
         shadow.className = sessionId;
     }
 };