Using Firefox with private browsing, I get this:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://www.reddit.com/r/all/.json?limit=20. (Reason: CORS request did not succeed). Status code: (null).
The resource at “https://www.reddit.com/r/all/.json?limit=20” was blocked because content blocking is enabled. rdx.overdevs.com
Works fine in normal mode though.