Edging and porn, does it cause problems?
Edging means getting close to climax and then backing off to stay aroused longer. On its own it is common. The honest question most people are asking is whether doing it with porn, for long stretches, causes problems, and the short answer is that it can, mostly because of where it leads.
The act versus the pattern
Edging by itself is not some unique danger. What matters is the pattern it tends to create with porn. Backing off to stay aroused stretches a session much longer, and to keep the arousal high, people often reach for more intense material. So the real costs are the hours it eats and the slow escalation, more than the act in the moment.
Where it tips into gooning
Edging is the on-ramp to gooning, which is the same thing taken far past the usual point, into a long, trance-like session that can run for hours. If your edging regularly turns into that, treat it as the bigger pattern to interrupt, and the guide on stopping gooning will be more useful than any tip about the act itself.
How to stop the pattern
Cut the fuel. Without the screen, the long sessions lose most of their pull, so blocking porn does more here than trying to change the habit by willpower. Escape's Safari blocker is free, needs no account, and blocks 40,000+ known sites the moment you turn it on, and it never sees or stores what you block. Then have one thing you always do when an urge starts, before you are too far in to choose. The honest look at how much is too much and the late-night urges guide both help. The blocker and a private day counter are free to start in the Escape app, no account.