> Electrolysis went live in spring 2017 (it came with Fx 48 and was gradually activated till Fx54). Around that time was the first massextinction of addons. Ok

> Electrolysis went live in spring 2017 (it came with Fx 48 and was gradually activated till Fx54). Around that time was the first massextinction of addons. Ok, so power users that mess with about:config (or users with zero extensions) were running e10s for more than a year before the WebExtension switch, and e10s was available in the beta and nightly channels long before then (ie. by late 2015). But what's really important is that the process of enabling e10s was gradual and well-managed from a user perspective, rather than being a singular event that broke almost every extension long before viable replacements could be developed for most of them.