In my case I am only interested in changing the font on one particular website. Specifically, I want to override the monospace font on a given website to eg, Menlo. For instance:
I'd rather not use an extension for this and I do want this to apply to one particular website, so a manual toggle to globally apply a piece of CSS is the last resort I can think of.
Is there an easier way to automate this that doesn’t require installing an extension?