This is a simple safari extension for Linkding, a self-hosted bookmark manager service. You can find it at https://github.com/sissbruecker/linkding.
This extension simply opens Linkding page with your URL pre-populated. It also provides an Options page where you can customize your linkding server address.
The first time you use the extension, it will open the Options page where you can configure the host name. If you need to update the host address, follow these steps:
1. Go to iOSs Settings
2. Go to Safari
3. Go to Extensions
4. Click on Linkding in the list
5. Switch on Linkding (this will enable the extension and allow you to continue to step 6)
6. Click on Settings