You can just add a .json at the end of any url on Reddit to get a JSON object of the page.

https://www.reddit.com/r/todayilearned/comments/3zfadv/til_t...

Maybe this will help?

Here's a (giant) png screenshot of the whole reddit thread: http://mirror.xwl.me/solitaire_history.png

Screenshot captured with phantomjs/rasterize.js and shrunk with pngquant.

Find out what type of firewall you're using. Find the vendor's website on how to request a url/domain re-categorization, and submit a change request. Most firewalls subscribe to a live database hosted by the vendor, and its request forms are public most of the time.