[do_not_redeem]

Sure maybe 20 years ago. But back then Linux's userbase was also on Windows, because desktop Linux hadn't really become usable yet. I think nowadays Firefox's marketshare is a lot higher on e.g. Ubuntu (where it's the default) than it is on Windows (where Edge is the default).

[fabrice_d]

According to Mozilla's own data at https://data.firefox.com/dashboard/hardware Windows (7, 10 & 11) make up 84% of their user base.

[3836293648]

That's not the claim being made and you know it

[jusssi]

Only thing that wasn't usable on Linux 20 years ago was games.