Firefox Flexible Space
Customization

How to manage toolbar’s Flexible Space on Firefox

Flexible Space allows you to customize Firefox's toolbar, and here's how you manage this feature.

On Firefox, the empty space that appears on either side of the address bar is known as “Flexible Space,” which allows you to add extra space to separate groups of items, or to center or make the address and search bar smaller by adding multiple flexible spaces.

If you want to add or remove empty space in the toolbar, it’s a very easy task on Firefox.

In this guide, you’ll learn the steps to manage Flexible Space on Mozilla’s Firefox web browser on Windows 10, but the same instructions will work with other OSes.

How to add or remove empty space on Firefox

  1. Open Firefox.

  2. Right-click the toolbar area, and select Customize.

    Firefox toolbar customization access
    Firefox toolbar customization access
  3. Flexible Space is represented as rectangle, simply drag and drop a rectangle in or out of the toolbar to add or remove empty spaces.

    Flexible Space (empty space) settings
    Flexible Space (empty space) settings
  4. Click the Done button.

Alongside Flexible Space, note that you can add and remove virtually any items that appear in the toolbar, including the search bar, home, history, full screen, and many more.