Until now I never had issues with Firefox.

But here in Germany the fanbase of ff ist larger. Maybe that’s why you don’t have problems with most of sites from Europe?!?

2 km bicycle ride to the train station, 25 minutes by train, 2 minutes walk to the office on the other side of the road.

Commuting in Germany.

It does not factor efficiency at all.

The bill does not care about efficiency.