Stop website from loading useless shit

File: today is most uneventful.jpg (742KB, 1920x1200px) Image search: [Google]

742KB, 1920x1200px

A website I use for reading novels is trying to load some elements every few seconds. Since I leave the tab pinned, it amounts to tens of thousands of blocked elements in an hour, and the site won't stop reloading.
How can I stop this shit?
According to the Firefox loading bar, most of the requests are from one domain, called ssp.streamrail.com

Is there a way to block a domain like this with ublock, or disable loading new content for a single tab entirely?
I tried an option in Firefox' about:config, but it didn't do anything.
Most addons I found just disable loading until the tab is active, but since it only needs to load the text once, there is no reason for this tab to update at all.