I know that some work has gone into getting the sign in with mail working. I reported this issue in a direct tag on micro.blog. Whatever changes happened worked for my device using Firefox. Previously, that didn’t work so that’s a serious improvement.
Probably not a high priority, but I did find that while using Konquerer trying to sign in, I get the following error.
Uncaught TypeError: Failed to resolve module specifier "@hotwired/stimulus". Relative references must start with either "/", "./", or "../".