Personas cannot be installed if they reference a data: URI for their headerURL or footerURL.

Click here to try and install this persona:

var data_uri_theme = {
    id: "data-uri-example",
    name: "Data URI Example",
    headerURL: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IAAAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1JREFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jqch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0vr4MkhoXe0rZigAAAABJRU5ErkJggg==",
    footerURL: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IAAAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1JREFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jqch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0vr4MkhoXe0rZigAAAABJRU5ErkJggg==",
    textcolor: "#bcf",
    accentcolor: "#8888FF"
};
		

It is an ugly theme, but it cannot be installed. (The image encoded in the data URI is a small red dot.)

Click here to install this persona pointing to http://... URLs for its headerURL and footerURL:

var http_uri_theme = {
	id: "http-uri-example",
	name: "HTTP URI Example",
	headerURL: "http://www.google.com/images/srpr/nav_logo13.png",
	footerURL: "http://www.google.com/images/srpr/nav_logo13.png",
	textcolor: "#bcf",
	accentcolor: "#8888FF"
};
		

It works (but is also ugly).