How to Remove a Button from the Firefox Menu If you have previously added some buttons to your Firefox menu, you can just as easily remove them to provide more room for other features.

How to Add a Button to the Firefox Toolbar Mozilla Firefox has a user interface that is extremely customizable. This means that you can add or remove buttons from the toolbar in order to customize ...

The tutorial is a bit dated (especially since Firefox 2), but it's a nice complement to Mozilla Developer Center's official Building an Extension document.

To import passwords to Firefox from another browser like Chrome or Edge, follow these steps- Open the Firefox browser on your computer. Click on the hamburger icon or the Menu button.