Unofficial Shlink extension
This unofficial extension provides a shortcut button to generate a short url using Shlink, a self-hosted link shortening service. You will need to run your own instance of Shlink for this extension to function!
After installing this extension, you'll need to go into the extension's preferences and enter your API key and the location of your Shlink instance.
Once installed and configured, click the extension and a short link will be requested from your instance for the page you're currently on. This short link will be copied to your clipboard, so you can easily paste it anywhere you'd like.