> Ff had an upgrade not long ago where they made it difficult to use extensions You're talking about the old extension API, which was more of a "do whatever th

> Ff had an upgrade not long ago where they made it difficult to use extensions You're talking about the old extension API, which was more of a "do whatever the heck you want" than an actual API, at that point in time it was pure technical debt - Mozilla was on a clock to remove it, or Firefox could never hope to stay competitive. It was a major roadblock in enabling modern sandboxing / isolation, performance improvements, developer productivity, etc. Can't you see they had no other alternative? They wouldn't lose the few die-hard users that absolutely "needed" their browser to do insane shit, because there was no other (maintained, modern) browser that could do all of that; and the sympathy of the remaining 99.999% of their user base was at stake. Whichever option Mozilla would go for, the 0.0001% would get the same thing - the browser you were OK with, eventually stops getting updates, becomes irrelevant, and dies. > If it is slow, I never noticed. Luckily we can rely on tooling, such as benchmarks and profilers, to gather actual empirical data, and use that to guide our decisions. Whatever may not be a noticeable difference on your system, could have an enormous impact on another. I remember switching from Chrome to FF right around Quantum, because it was finally usable on my hardware.