All commits to the Chrome codebase are gated through Google, an ad company whose driving motivation is in delivering value to shareholders, not to improving the web. Once the web becomes a Google monoculture, I won't be holding my breath to see any features land on the web that could threaten Google's bottom line.

You don't want 1 hidden hard to fix bug to wreck the entire internet. It's obvious wide use of a tool need multiple implementations.

here are some actual metrics from our ecommerce site (US, home remodeling / DIY):

if you look at desktop traffic only:

  Nov 2015: 16.01%
  Nov 2016: 13.27%
  Nov 2017: 10.33%
  Nov 2018:  8.14%

Desktop IE in Nov 2018 was 11.37%, Edge 15.65%, Chrome 52.74% and Safari 11.65%.

if you include mobile traffic (where Firefox is basically non-existent), then Nov 2018 is closer to 3.5%.

talk about bleak :(

The absolute number is not that important, the trend is. That's clear even in Mozilla's own data: https://data.firefox.com/dashboard/user-activity shows they went from 303M monthly active users at the end of Nov. 2017 to 277M this year. This is a serious drop.