[atopal]

The core browser set is not defined in exact versions of browsers, since many browsers release every 4-6 weeks. The two most recent major versions refers to the number before the first point. So, for Chrome it would be 113 and 112, for Safari it would be 15.x and 16.x.

But the crucial point is, it's not the same for every feature. A feature like subgrid was launched years ago in Firefox, last year in Safari and will be launched later this year in Chromium. So, by the time it's in Baseline, it will be in two versions back for Chromium browsers, but 20+ versions back for Firefox and over a year old in Safari.

Maybe showing the version numbers on the widget per feature might be useful.