@peter it's cause on some browser user-agents, the font-size of an h3 tag was defined absolutely, not relative to the current font-size. here's a screenshot on windows 9x!
@peter this isn't my screenshot, but i have seen this site before and saw someone explain this context so i went searching for proof and found this screenshot linked when this site was shared on Hacker News https://news.ycombinator.com/item?id=28058893
@h@peter Yeah, I vaguely remember that the way those tags worked was changed sometime around when CSS was first introduced, or at least sometime after browsers finally started actually correctly implementing CSS.
Gregory's Server
@peter this isn't my screenshot, but i have seen this site before and saw someone explain this context so i went searching for proof and found this screenshot linked when this site was shared on Hacker News https://news.ycombinator.com/item?id=28058893