diff --git a/src/js/contentscript-end.js b/src/js/contentscript-end.js
index 180fa8094..e6047f022 100644
--- a/src/js/contentscript-end.js
+++ b/src/js/contentscript-end.js
@@ -467,7 +467,12 @@ var uBlockCollapser = (function() {
         while ( i-- ) {
             elem = elems[i];
             shadow = elem.shadowRoot;
-            if ( shadow !== null && shadow.className === sessionId ) {
+            // https://www.chromestatus.com/features/4668884095336448
+            // "Multiple shadow roots is being deprecated."
+            if ( shadow !== null ) {
+                if ( shadow.className !== sessionId ) {
+                    elem.style.setProperty('display', 'none', 'important');
+                }
                 continue;
             }
             // https://github.com/gorhill/uBlock/pull/555
diff --git a/src/js/contentscript-start.js b/src/js/contentscript-start.js
index f45d904e9..6a8ceff2b 100644
--- a/src/js/contentscript-start.js
+++ b/src/js/contentscript-start.js
@@ -178,7 +178,12 @@ var hideElements = function(selectors) {
     while ( i-- ) {
         elem = elems[i];
         shadow = elem.shadowRoot;
-        if ( shadow !== null && shadow.className === sessionId ) {
+        // https://www.chromestatus.com/features/4668884095336448
+        // "Multiple shadow roots is being deprecated."
+        if ( shadow !== null ) {
+            if ( shadow.className !== sessionId ) {
+                elem.style.setProperty('display', 'none', 'important');
+            }
             continue;
         }
         // https://github.com/gorhill/uBlock/pull/555