How to Change Your Default Applications on Ubuntu: 4 Ways

There are several ways to change your default applications on Ubuntu. Whether you’re changing the default application for a particular task, file type, or a system-level application like your default text editor, there’s a different place to go.
Unlike on Windows, applications won’t take over existing file extensions during the installation process — they’ll just appear as an option after you install them.

Desktop Applications

To set your default desktop applications for actions such as Web Browser, Email, or Video, open the System Settings window from the panel.

Select the Details icon in the System Settings window.

Select the Default Applications category and use the drop-down boxes to select a default application. Application will appear here after you’ve installed them – for example, you can install VLC and select it as your default video player from here.

Removable Media

From the Details control panel, you can also select your default applications for different types of removable media. By default, Ubuntu will ask you what application you want to use when you insert a removable media device. You can change this – for example, you can have Rhythmbox automatically open and play audio CDs when you insert them.

File Associations

To set the default application for a specific file type, locate a file of that type in the file manager, right-click it, and select Properties.

Click the Open With tab and select the application you want to use for that file type. Use the Set as default button to make the application the default application.