[tobias3]

Yeah, one needs to check those extensions one by one for performance problems. My performance problems with Firefox went away when I uninstalled Ghostery a while back.

Firefox is doing a good job about analysing extensions startup performance, but I guess they need to do the same thing for page loads and memory usage. Or integrate the extension functionality into core more.

[Silhouette]

It seems to me that extensions used to be more integrated and the goal of the new model is, as much as anything, to separate and encapsulate them more. In theory, that should help with security and stability issues.

Unfortunately in practice what's happened so far is that lots of useful little things aren't possible any more because the new API doesn't support them, while extensions are evidently still capable of causing problems with performance and stability anyway.

Hopefully both of these aspects will improve in time. In particular, the emphasis on personalisation and improving the extensions ecosystem in this roadmap is welcome and seems very much in keeping with what a lot of us used to like about Firefox. I hope they really do put their focus there and exercise caution on becoming too "opinionated".