Personas (Lightweight Themes)

Lightweight themes consist of two images: one that is used as the background for the tool bars, address bar, search bar, and tab strip, and a second image that's used as the background for the status and find bars at the bottom of the window

Distributing lightweight themes on your own site

Here's a code snippet to self-host your themes. (Based on the test page that can be found at Bug 511771)

JavaScript:

var themes = [
  {
    id: "example-01",
    name: "Third Planet",
    headerURL: "http://www.example.com/personas/01/header.jpg",
    footerURL: "http://www.example.com/personas/01/footer.jpg",
    textcolor: "#fff",
    accentcolor: "#6b6b6b"
  },
  {
    id: "example-02",
    name: "Foxkeh Boom",
    headerURL: "http://www.example.com/personas/02/header.jpg",
    footerURL: "http://www.example.com/personas/02/footer.jpg",
    textcolor: "#bcf",
    accentcolor: "#8888FF"
  }
];
 
const INSTALL = "InstallBrowserTheme";
const PREVIEW = "PreviewBrowserTheme";
const RESET_PREVIEW = "ResetBrowserThemePreview";
 
function setTheme(node, theme, action) {
  node.setAttribute("data-browsertheme", JSON.stringify(themes[theme]));
  var event = document.createEvent("Events");
  event.initEvent(action, true, false);
  node.dispatchEvent(event);
}

HTML:

<button onclick="setTheme(this, 0, INSTALL);"
        onmouseover="setTheme(this, 0, PREVIEW);"
        onmouseout="setTheme(this, 0, RESET_PREVIEW);">Install Third Planet Theme</button>
<button onclick="setTheme(this, 1, INSTALL);"
        onmouseover="setTheme(this, 1, PREVIEW);"
        onmouseout="setTheme(this, 1, RESET_PREVIEW);">Install Foxkeh Boom Theme</button>

Note that preview by mouseover doesn't work unless your site is added to the white list of application.

Distributing lightweight themes as downloadable XPI

From within a Bootstrap Style Extension's bootstrap.js, you can issue code similar to the following to install and activate a lightweight theme and uninstall it on plugin deactivation.

let lightweightTheme = {
    id: "example-01",
    name: "Third Planet",
    headerURL: "http://www.example.com/personas/01/header.jpg",
    footerURL: "http://www.example.com/personas/01/footer.jpg",
    textcolor: "#fff",
    accentcolor: "#6b6b6b"
};
 
Components.utils.import("resource://gre/modules/LightweightThemeManager.jsm");
 
function startup(data, reason) {
LightweightThemeManager.themeChanged(lightweightTheme);
}
function shutdown(data, reason) {
LightweightThemeManager.forgetUsedTheme(lightweightTheme.id);
}