diff --git a/extension/src/json-viewer/load-css.js b/extension/src/json-viewer/load-css.js
index 251e9aa..3abce2d 100644
--- a/extension/src/json-viewer/load-css.js
+++ b/extension/src/json-viewer/load-css.js
@@ -33,13 +33,13 @@ function loadCSS(opts) {
       }
 
       if (/loaded/.test(content)) {
-        clearTimeout(scheduleId);
+        cancelAnimationFrame(scheduleId);
         document.body.removeChild(checkElement);
         resolve();
 
       } else {
         attempts++;
-        scheduleId = setTimeout(scheduleCheck, 1);
+        scheduleId = requestAnimationFrame(scheduleCheck, 1);
       }
     }