Bookmark this link: Singlify a thread page
Alternatively, on ios: Bookmark this page, then edit the bookmark address and remove everything from the beginning upto and including the pound sign (#).

If you want to inspect the code, here is a slightly more readable version: Singlify script source before minification. I assign pretty much everything I do twice into a variable to increase compression to fit the script to the address bar/bookmark url.

The minification is done using http://jscompress.com/