It appears like the Tiddlyspot where JD’s mobile view is no longer accessible.
Does anyone happen to have a backup on hand? I can’t help but wish we had an archiving system for community content, seeing plugins disappear over time is rather sad :<
(Albeit, if it’s the creators wish to remove their content, that is a different story, but I digressed.)
Here’s the most recent backup courtesy of the Wayback Machine. (Always a good first stop when something disappears, IMO, but especially helpful with TW, since you don’t run the usual risk that the bot didn’t crawl the specific page you’re looking for!)
ETA: And if you want to be more proactive about making sure things aren’t lost to the ether, there’s a Wayback Machine extension available for Firefox and Chrome (perhaps others?) that you can use to prompt the bot to archive any page you’re currently viewing and/or quickly access older versions it’s already saved. 
Thank you 
Oh, that’s good to know, thank you for that as well