I have some strange issues with the monospace fonts in Vivaldi (Chrome):

(https://docs.python.org/3/library/logging.html)

Notice how the spacing is too large and numbers seem to be unicode symbols(?)

It looks fine in Firefox:

I can see there were some changes last year (#85, #87). If I change the CSS to:

tt, code, pre {
    font-family: monospace, monospace;
    font-size: 96.5%;
}

this seems to fix my issue. Having just a single monospace causes the text size to be a bit strange.