How to fix bad fonts

Some sites set bad and ugly fonts, or fonts that look bad on winxp only. This is the tour how to fix

Inspect element of the page

Right click on the bad font and choose Inspect element

Look above for class word.

Copy the value by right click

UserContent.css

Close the browser, open the profile folder and look for the chrome folder inside, if it is no such folder then create it, There is a file UserContent.css, create it if not exists. Add to the file this below, set font-family and size values you want and save the file. Then launch the browser and see changes.

@-moz-document domain("spacesimcentral.com") {
.entry-content {font-family: Verdana !important;
font-size: 150% !important;
}
}

Second site

@-moz-document domain("www.eso.org") {
.news-teaser {font-family: Arial !important;
font-size: 120% !important;
}
}