diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index c024bb64..d45c7c2a 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -336,9 +336,9 @@ class Popup {
         const {secret, token} = await this._initializeFrame(this._frame, this._targetOrigin, this._frameId, (frame) => {
             frame.removeAttribute('src');
             frame.removeAttribute('srcdoc');
-            frame.setAttribute('src', chrome.runtime.getURL('/fg/float.html'));
             this._observeFullscreen(true);
             this._onFullscreenChanged();
+            frame.contentDocument.location.href = chrome.runtime.getURL('/fg/float.html');
         });
         this._frameSecret = secret;
         this._frameToken = token;