[Silhouette]

Firefox 57 launched at the end of 2017 and was very much a love-it-or-hate-it change. Some people saw a significant performance improvement and that was important for them. Other people didn't have a problem with its performance anyway but saw the entire ecosystem of extensions that made Firefox different thrown under a bus.

I'm firmly in the latter camp, and if it weren't for the security implications I'd still be running pre-57 Firefox with the full set of extensions I found useful. If I didn't need to use all the major browsers anyway because of my web development work and I wasn't so untrusting of Google in terms of privacy, I might easily have decided at that point that Firefox no longer had any compelling advantage over Chrome and switched. Presumably some people did.