Note that the ability to install extensions on your Island Browser may be restricted or controlled by your organization's IT policies. If you encounter any issues or restrictions, it is recommended to consult with your IT department or system administrator for further assistance.

To install extensions on the Island Browser, you can follow these steps:

1. Open the Island browser on your managed device and click on the three vertical dots in the top-right corner to open the Island menu.

2. From the menu, select "Settings" to open the Island settings page.

3. In the settings page, scroll down and click on "Extensions" in the left-hand sidebar.

4. On the Extensions page, you will see a toggle switch labeled "Developer mode" in the top-right corner. Toggle it on to enable developer mode.

5. Once developer mode is enabled, you will see a new option labeled "Load unpacked" appear in the top-left corner. Click on it.

6. A file browser window will open. Navigate to the location where you have downloaded or saved the extension files on your device.

7. Select the folder containing the extension files and click on the "Select Folder" button.

8. Island will now load the extension from the selected folder and add it to your managed environment.

9. Once the extension is successfully loaded, you will see it listed on the Extensions page with its name, description, and options to manage it.