[bigbugbag]

He meant that no browser with a significant market share will implement thi, the sites will remain broken which will only be evident in firefox. The side effect will be people visiting those sites will switch a different browser.

[michaelmior]

Given the OP's reply, I don't think that's what he meant so I would be careful about making statements on behalf of others.

Apparently Firefox is sitting at 6.1% market share right now[0]. Far behind Chrome and Safari but still quite significant.

[0] https://amosbbatto.wordpress.com/2017/11/21/mozilla-market-s...