[rosser]

No, it's specifically what this thread is about.

The thread-parent absolutely cast a wider net than warranted, but everyone in this discussion who has experienced this problem knows exactly which one we're talking about, and the rest are all, "I've never seen a problem!" or "It's probably just extensions." Meanwhile, there's reliably a sub-thread somewhere in the discussion on nearly every article about Firefox, about this problem.

I find it profoundly ironic that you comment down-thread that "humans are very prone to confusing things which affect them personally with the general case" about a thing which you haven't personally experienced. You talk as if those of us for whom this is a 100% reproducible problem are an edge case, based AFAICT solely on your own not suffering it, coupled with your (not incorrect) beliefs about people poorly attributing performance problems in general.

That juxtaposition is really galling.

[acdha]

I was aware of the issue already but that’s also why I knew that the biggest impact comes from a non-default setting. I never said that it wasn’t a real problem, or that it doesn’t warrant attention — only that it wasn’t as broad as claimed and that is a very common problem with browser issues because everyone uses them but people who don’t have problems generally don’t go around posting that everything is fine whereas the percentage of users who are affected will complain regularly.