This bookmarklet can be dragged the bookmark bar of your browser. When you are on the profile page of a Mastodon user you wish to follow, click on the bookmark and it should take you to your server and with one click allow you to follow.
Drag the following link to your bookmark bar: Mastodon follow
Note: if your server is NOT mastodon.social... once added to your bookmark bar, edit the bookmark and find the text 'mastodon.social' and replace with the url of your Mastodon server
feedback to @chriskeene@mastodon.social / https://mastodon.social/@chriskeene