1 files changed, 10 insertions, 3 deletions
diff --git a/qutebrowser/javascript/stylesheet.js b/qutebrowser/javascript/stylesheet.js
index 21a62b25d..1f1bdbd57 100644
--- a/qutebrowser/javascript/stylesheet.js
+++ b/qutebrowser/javascript/stylesheet.js
@@ -132,11 +132,18 @@ window._qutebrowser.stylesheet = (function() {
             css_content = css;
         }
         // Propagate the new CSS to all child frames.
-        // FIXME:qtwebengine This does not work for cross-origin frames.
         for (let i = 0; i < window.frames.length; ++i) {
             const frame = window.frames[i];
-            if (frame._qutebrowser && frame._qutebrowser.stylesheet) {
-                frame._qutebrowser.stylesheet.set_css(css);
+            try {
+                if (frame._qutebrowser && frame._qutebrowser.stylesheet) {
+                    frame._qutebrowser.stylesheet.set_css(css);
+                }
+            } catch (exc) {
+                if (exc instanceof DOMException && exc.name === "SecurityError") {
+                    // FIXME:qtwebengine This does not work for cross-origin frames.
+                } else {
+                    throw exc;
+                }
             }
         }
     };