Firefox 38.0.5

There are public instances of Wallabag; the good folks from Framasoft run one. It seems to be at least partially translated in English. Certainly not good enough for the hundreds-of-millions-of-users-immediately criteria, but a start.

I also think that it is a false dichotomy to say: you can either use Google or other for-profits with big data centers, or you self-host (and are thus considered marginal). Even for the self-respecting geek, the Internet gets too complex to self-host everything from mail to voice to collaborative services. Given the ridiculous prices for renting dedicated servers, there is a middle ground that I call "friend computing" - you are hosted by the geek of your confidence. (I do know this does not work for everyone; some prefer being watched by a presumably anonymous NSA or other big-data to _possibly_ being watched by your friend. But it can work for some others.) And, on a larger scale, you have non-profits and communities like Framasoft, running public instances of Free Software services and asking for donations. In the long run, peer-to-peer web applications (where each browser is also a tiny server) might become another alternative.