Use your own font with CSS rules.
As always, use an up-to-date script manager such as Violentmonkey or Tampermonkey.
Using custom fonts assumes that you have them installed on your system.
Replace "Roboto" in the source code with your own font if needed. If nothing changes and you're sure you've spelled the name of a font correctly it might be due to browser fingerprinting protection. Look up a way to disable fingerprinting for language preferences in your browser. This will reduce your privacy on the internet, though. If you're using Chrome/Edge you shouldn't have issues since they're not private anyway.
* {font-weight: 400 !important} makes the font thinner and easier to read, it works well with Roboto but if you don't need it, remove the line.
Technically you can add any CSS rules to this script besides changing font. I made it as a static configuration, it won't be updated.
