Can I change the default startup behavior in Mozilla Firefox?

@mike 

Yes, you can change the default startup behavior in Mozilla Firefox by following these steps:

1. Open Firefox and type "about:config" in the address bar.
2. Click on the "I accept the risk!" button to proceed.
3. In the search bar, type "browser.startup.page".
4. Double-click on the "browser.startup.page" preference.
5. A dialog box will appear. Enter the desired value: 0: Blank page 1: Homepage 2: Last visited page 3: Resume previous session
6. Click "OK" to save the changes.

Now, Firefox will start with the behavior you specified.