1. Open the SupLogin client and go to [Extension Center].

2. In the Extension Center page, click "Add Custom Extension", then select "From Local".

3. In the pop-up dialog, select the folder path of the local extension.

4. The system will automatically recognize the extension content. Once recognition is complete, click "Confrim" to successfully add the extension.

5. After adding, you can find the extension in the My Extensions section. Click "Settings" to configure its activation scope: choose to enable it for all browser windows or only for specific ones.