Hi! If YouTube and Instagram aren’t working but other sites are fine, it usually points to site-specific issues or browser settings rather than a general internet problem. Here are some things to check: '''Clear cache and cookies''' Go to Settings → Privacy & Security → Cookies and Site Data → Clear Data… Make sure to clear both cookies and cached content, then restart Firefox. '''Check extensions''' Some extensions (ad blockers, privacy tools, or script blockers) can prevent these sites from loading. Try Troubleshoot Mode (Menu ≡ → Help → Troubleshoot Mode) to see if the sites work without extensions. Hope this helps!