As you add new Firefox extensions, though, the toolbar can become filled with unwanted icons. This guide will explain how to remove a button from the Firefox toolbar.

For example, you can't add a button to set a specific line spacing value. If you can't add the button, no option to "Add to Quick Access Toolbar" will appear when you right-click the ribbon.

If you would like to enable Shared Workbook option, here's a way to add it to Excel Quick Access Toolbar. It is hidden under Excel Options.

Mozilla Firefox supports an Extension button on the toolbar, but it must first be enabled. We explain how to do it and add the button.

To add a new button to the Firefox toolbar, right click on any of the toolbar icons and a menu should appear as shown below.