Hi there, I’m sorry you’re having trouble — that’s definitely frustrating, especially if Firefox used to work just fine. Let’s try a few easy steps to get it working again: Restart your computer – sounds basic, but it really does fix a lot of things. Update Firefox – open Firefox, click the three lines in the top-right, choose Help > More troubleshooting information, and check for updates. Clear Firefox’s cache – three lines > Settings > Privacy & Security > scroll down to Cookies and Site Data > click Clear Data. Try disabling add-ons – sometimes an extension breaks things. Three lines > Add-ons and themes > disable anything you don’t recognize. If it still won’t open: You can reinstall Firefox. Go to firefox.com, download it, and install it. Your bookmarks should stay safe. None of these steps require any “computer college” knowledge — just follow them one at a time. If you’d like, tell me exactly what Firefox is doing (won’t open, pages won’t load, etc.), and I can walk you through it step-by-step.