I was able to use it by copying the swimmer emoji and clicking on the green icon. However while this does create a new swimlane, it only works for one single column. I tried several times and found no way to reproduce the columns of the first line on the new one. I guess it's doable, but it's too complicated and Trello doesn't seem to react properly. Might be interesting for people with more time/technical skills to make it work.

To enable addon you need to click on search bar on green addon icon.
Works fine!

Note: Please change the shortcut because overrides the screenshot shortcut. :)

Doesn't seem to work

My favorite trello addon. Also, mentioned a problem with Jeff and he fixed it immediately.

Cannot find this "Swimmer Emoji". Typical case of an add-on written without proper documentation: Missing more screenshots and a link to a video

Thanks! I have been waiting for swimlanes in Trello for a long time! Extension works great.