How do I keep my favorites with Firefox?

To keep your favorites in Firefox, you can use the Bookmarks feature. Simply click on the star icon in the address bar when you're on a webpage you want to save, and select a folder to store it in. You can also organize your bookmarks into folders by going to the Bookmarks Library (Ctrl + Shift + B) and dragging bookmarks into desired folders. Additionally, consider syncing your bookmarks with a Firefox account to access them across multiple devices.