You install that, then when you come across one of these tiny/hard to read/low contrast freakin' sites, or one with a lot of extra crap on it (ads, video), you select the type and then click on this extension's icon and it makes it easier to read. Bigger type. Black type on white. No extra crap. IT WORKS.
If you know CSS (I don't) you can customize it more to your liking.
This entry was originally posted at https://laridian.dreamwidth.org/2898440.html. Please comment there using OpenID.