[bit_logic]

Firefox had the chance to remain relevant when it still had some significant market share and if they had gone all in on ad blocking (basically something like merge ublock origin directly into Firefox). Unfortunately, since most of their revenue is from Google, it could never happen due to conflict of interest.

[abirch]

Do you think major websites that are funded by ads would simply block Firefox with merged ad blocker?

[bit_logic]

At this point, probably, but in the past when FF had 30% market share? It would've at least forced a serious discussion in the industry on what are acceptable ads. Or maybe it would've been the impetus for a working microtransaction system built into the browser. Instead, they did nothing with their influence.