This is the main reason I completely ditched Reddit, if you use the new Reddit interface instead of the old one (old.reddit.com), you’ll see a constant request being made to “https://www.reddit.com/svc/shreddit/events” (open your DevTools > Network tab, can’t see on Firefox idk why).
The problem is, if you add this to your Ublock Origin filters the website won’t load properly, that’s why uBO team didn’t block it already.
You’ll notice this request isn’t only being made from a interval but also when you do basically any action in the site, like pausing or resuming a video (send timestamps of when did you pause or resumed).
It sends other kind of data like what subjects you’re seeing when closed a tab or the related subjects of a post you click, this all can be used to trace a perfect profile of you and things you like.
You can avoid that by using the old.reddit but it still has the same kind of tracker, even tho you can block it here without major issues.
By my analysis, old Reddit interface does the same but to a random URL path that always starts with “reddit.com/api/something”. Ex.: reddit.com/api/friends So you can block anything that starts with “www.reddit.com/api” in your custom filters (after all you’re using old.reddit.com), then you’re mostly free from Reddit trackers (more or less). Side effect is, you won’t be able to use the chat in the old interface.
It should explicit start with “www.reddit” or it’ll be targeting “old.reddit.com/api” which is used for site features. Then you’ll see everything works as usual, no issues, but this request is blocked (the trackers).
I use www.reddit, so there’s no old.reddit calls happening. You can change in the settings whether www is old reddit or shreddit (until you clear your cookies).
Anyway, my point was more that that’s just the general frontend-backend communication happening there. If you turn that off, even old reddit won’t work anymore. It’s not something you should be blocking.
The old reddit will work fine my friend, the new one won’t.