Problem <del>mostly, but not entirely,</del> solved. For <del>Arimo</del> whatever font you want to install, you need to insert this text between the <familyset> tags in the file /system/etc/system_fonts.xml: <family> <nameset> <name>the name of your font</name> <name>arial</name> <name>helvetica</name> </nameset> <fileset> <file>Arimo-Regular.ttf</file> <file>Arimo-Bold.ttf</file> <file>Arimo-Italic.ttf</file> <file>Arimo-BoldItalic.ttf</file> </fileset> </family> And remove the designations of "arial" and "helvetica" from the Roboto entry. <del>The reason this is not entirely solved is it works only in the browser and not the HTML viewer.</del>