Change Extensions preferences in Safari on Mac
In the Safari app on your Mac, use Extensions preferences to change how you use extensions installed on your Mac. To change these preferences, choose Safari > Preferences, then click Extensions.
Safari extensions are software programs you can install to customize the way your browser works. For example, extensions can show news headlines in a bar below the toolbar, change the appearance of web content, or add buttons to the Safari toolbar.
Extensions list (on the left)
Shows which extensions are installed on your Mac. Select one to see or change its settings.
Safari extensions will update automatically with their apps.
Extension checkbox (on the left)
Turn an extension on or off by clicking the checkbox next to it.
Extension settings (on the right)
See or change settings for the selected extension.
To remove an extension that came with an app, simply drag the app to the Trash.
Open the App Store, where you can find Safari extensions to install.
Note: To provide some features, extensions may access the content of the webpages you visit. It’s good practice to check which extensions you have installed and make sure you’re familiar with what they do.