If "Settings->Theme->Dark" is a weird browser configuration, then yes. I see white font on a black background, which looks great on many other pages and doesn't hurt my eyes looking at sunspots while most of the page is basically staring at the sun.

There are dozens of us - dozens! - and Jeff's page looks uniquely bad. Something about the font weight, perhaps? The strokes are so thin as to disappear. Zooming to 150% makes it much more readable.

Can you tell me more about your configuration? On my Mac, at least, the site is quite legible in both light and dark mode. The main thing I'm wondering is what font is being picked up. On my Mac, I see Georgia... maybe it's just when it switches to Times or 'serif'?

It's the 'serif', I'm on Ubuntu 22.04 with neither Georgia nor Times installed. Here's a screenshot at 100% zoom:

https://i.imgur.com/xdMq8SJ.png

and here's a screenshot at 150%:

https://i.imgur.com/hKcCBo7.png

I do see something funny going on with the ligature for 'ff' in "different vendors" and "official retailers, " especially at 100%.

Running `fc-match serif` says that the fault being picked up is DejaVu Serif [0]

[0] https://dejavu-fonts.github.io/Samples.html

Oh wow, that's bad! I guess I haven't tested in FF on Linux recently, but I just updated to default to Helvetica/Arial/sans-serif, and in my quick peek from Ubuntu it seems to look a bit nicer now.

Text looks fine to me, Firefox on macOS. Perhaps you could make use of the "system font stack", which might fall back to a decent Serif font on other OSes.

https://systemfontstack.com/

Your system isn't set to prefer dark mode.