list-resources.js

// -sp-context:browser
Components.utils.import("resource://gre/modules/devtools/dbg-server.jsm");
Components.utils.import("resource://gre/modules/devtools/dbg-client.jsm");
let { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
let { StyleSheetsFront } = devtools.require("devtools/server/actors/stylesheets");

let client;

function startDebugger()
{
  // Start the server.
  if (!DebuggerServer.initialized) {
    DebuggerServer.init();
    DebuggerServer.addBrowserActors();
  }
  // Listen to an nsIPipe
  let transport = DebuggerServer.connectPipe();
  // Start the client.
  client = new DebuggerClient(transport);
  client.connect(onConnected);
}

function shutdownDebugger()
{
  client.close();
}

/**
 * Start debugging the current tab.
 */
function onConnected()
{
  // Get the list of tabs to find the one to attach to.
  client.listTabs(function(response) {
    // Find the active tab.
    let tab = response.tabs[response.selected];
    // Attach to the tab.
    client.attachTab(tab.actor, function(response, tabClient) {
      if (!tabClient) return;
      // Attach to the thread (context).
      client.attachThread(response.threadActor, function(response, threadClient) {
        if (!threadClient) return;
        // Fetch the JS sources.
        threadClient.getSources(function(response) {
          console.log("JS:", response.sources.map(s => s.url));

          // Fetch the stylesheets.
          let ssf = StyleSheetsFront(client, tab);
          ssf.getStyleSheets().then((styleSheets) => {
            console.log("CSS:", styleSheets.map(s => s.href));
          });
        });
        // Resume the thread.
        threadClient.resume();
        // Debugger is now ready and debuggee is running.
      });
    });
  });
}

startDebugger();
// shutdownDebugger();