Fix Facebook Black Screen Firefox

When I open Facebook in Firefox and try clipping a Youtube video the screen is going completely black and so I cannot post what I want. The problem is immediate and critical.

So far I haven’t taken any real troubleshooting steps—mainly because I’d like proper guidance before I start changing settings. I haven’t even cleared the cache or cookies and all my extensions are still enabled.

What I need from you is straightforward: diagnosis why Facebook is now blacking out in Firefox, walk me through the most effective fixes (starting with a safe way to clear cache and cookies), and let me know whether sticking with Firefox is advisable or if I should move to Chrome or Safari for a more stable experience.

Deliverables
• A clear, step-by-step fix I can follow or replicate in the future
• A short recommendation on browser choice based on your findings
• Confirmation that the black screen no longer appears once the steps are complete