AOL making all that money on dial-up. I can’t remember where I heard it, but apparently almost all of it comes from Point Of Sale terminals. I expect those newsagents that want to accept Visa will probably end up going Square + Cheap Android + GiffGaff before too long.
Second: Firefox Add-ons.
Disclosure: I work for Mozilla, but not on Extensions, or Quantum.
When the addons API first came about, it was really just a very thin veneer on top of the implementation details of XUL and the internals Firefox. This made it large and extremely powerful, but also made the add-ons API — and thus the add-ons themselves — a massive attack surface for the whole browser. More importantly, it became a huge drag on changing the internals: whether to [move to a multi-process model, optimize Gecko or update the UI.
The change was quite a bit about standardizing the extensions model, but mostly — I think — about giving the Firefox team head room for increasingly ambitious optimizations.
The new WebExtensions API is sane, and largely Chrome compatible. More APIs are being added — the teams are soliciting for APIs to expose — but in a considered manner designed not to back the browser into a corner in the future.
I’ve just typed all this in and found an excellent Hacker News post from someone far cleverer than I am on exactly this subject.