After installing Firefox, my first move is to enable the menu bar by right-clicking the tab bar and selecting Menu Bar.
In my experience, the menu button (found on the navigation bar and characterized by 3 horizontal lines) lacks several valuable options that are found on the menu bar.
With the menu bar now visible, I can find Tools > Options and explore the options available.
Here, decisions are made such as what home page you see every time the browser starts, what directory files are downloaded to, and whether or not your passwords are saved.
Decisions, decisions.