Some of us aren't young anymore
It's not possible to change font size, right ?

I know exactly what you mean. In fact, at 71, I'm probably the oldest TE member!!
Many, if not most, web contents seem to be made by young people for young people. Besides, many people have poor eyesight from a young age.
As others have already suggested, you can increase or decrease the font size with Ctrl+scrollwheel or Ctrl++/- or in your browser settings.
I used to have excellent eyesight when I was younger. Nowadays it depends a lot on whether I've been sleeping well or not. If I've been sleeping for 8 hours a night for a few nights in succession, I have no trouble reading the tiny fonts used by many websites. If not, then everything is blurry and I have to increase the size. This is all without glasses.
What I hate more than a small font size is poor colour theme. Dark grey font on a black background or light grey font on a mid-grey background, etc etc. Ugghh
