[parfe]

I installed the https://addons.mozilla.org/en-US/firefox/addon/stylish/ addon for firefox and have set news.yc to use the following stylesheet:

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("news.ycombinator.com") {

    .title{
        font-size: 16px !important;
        padding: 0.5em !important;
    }

    .subtext{
         font-size: .8em !important;
         padding-left: 0.5em !important;
    }

    .comment {
         font-size: 16px !important;
    }

    .comhead{
        font-size: 1em !important;
    }

    .pagetop{
        font-size: 16px !important;
    }

}

I mixed px and em as I tried different settings, but just stopped when I found something I liked.

[bilban]

This is a great one site solution, but it get's a bit tedious personalising each and every site individually.