Hey platinumloka, that sounds like a YouTube playback or account-related issue rather than a Firefox bug. Here are a few things you can try: '''Clear YouTube cookies and site data''' * Go to Settings → Privacy & Security → Cookies and Site Data → Manage Data, * Search for youtube.com and remove it. * Then reload YouTube and sign in again. '''Disable extensions or try Troubleshoot Mode''' * Menu ☰ → Help → Troubleshoot Mode… → Restart. * If ads or videos start working there, one of your add-ons (like an ad blocker or privacy extension) may be interfering. '''Update Firefox''' Make sure you’re using the latest version — YouTube often changes its code, and older Firefox builds can have playback issues. '''Test in a Private Window''' This forces YouTube to load cleanly without cached data or stored cookies. If the problem only happens when signed in, it might be caused by your Google account’s ad-personalization or experimental flags. Try logging out, clearing data, then logging back in and see if playback returns to normal.