Post just keep flooding onto my feed

Is there a way to set an option to manually refresh the front-page feed? When I set it to "All" (or even sometimes to "Local"), I'll get a constant flood of posts being added onto page, and it's so fast that I can't keep up. This happens no matter what sorting method I choose; even "Most comments" will have a dozen brand-new threads with 0 comments drop onto my screen within just a few seconds.

I'd like to use "All" to find more communities to subscribe to, but right now, it's impossible to use. In the time it takes me to read a thread title, 15 more have pushed it off the bottom of the screen.