A Chrome extension that simplifies following Fediverse/Mastodon users on other instances than your own by automatically redirecting you to your instance when pressing a follow button. Should work for other Chromium browsers too, as well as Kiwi browser on Android. It was tested with about 20 instances and supports different instance layouts/designs.
Right now, you need to install it using developer mode. The extension is already submitted for review by Google, so it shouldn't be long until you can install it from the Chrome Webstore.
When visiting a user profile on other Mastodon instances, the follow button will now redirect you to your home instance. The redirection is shortly indicated in the follow button itself. Info modals are blocked because they are not needed due to redirection.