It supports both links and embeds and is available on firefox for android. List of sites is on github. I’m the main developer so you can ask questions.
The sites to be redirected shouldn’t be already pre-selected by the extension. E.g I am logged in to Twitter on my browser and installing this extension will unintentionally redirect me to some instance.
And also, maybe the sites for redirection should be added by the user instead of the extension making assumptions. With libredirect I can click more options and add the site to Chrome’s handler.