List Open Tabs
To follow this tutorial you'll need to have
installed the SDK
and learned the
basics of cfx
.
To list the open tabs, you can iterate over the
tabs
object itself.
The following add-on adds a
widget
that logs
the URLs of open tabs when the user clicks it:
var widget = require("sdk/widget").Widget({
id: "mozilla-link",
label: "Mozilla website",
contentURL: "http://www.mozilla.org/favicon.ico",
onClick: listTabs
});
function listTabs() {
var tabs = require("sdk/tabs");
for each (var tab in tabs)
console.log(tab.url);
}
If you run the add-on, load a couple of tabs, and click the widget, you'll see output in the console that looks like this:
info: http://www.mozilla.org/en-US/about/ info: http://www.bbc.co.uk/
You don't get direct access to any content hosted in the tab.
To access tab content you need to attach a script to the tab
using tab.attach()
. This add-on attaches a script to all open
tabs. The script adds a red border to the tab's document:
var widget = require("sdk/widget").Widget({
id: "mozilla-link",
label: "Mozilla website",
contentURL: "http://www.mozilla.org/favicon.ico",
onClick: listTabs
});
function listTabs() {
var tabs = require("sdk/tabs");
for each (var tab in tabs)
runScript(tab);
}
function runScript(tab) {
tab.attach({
contentScript: "document.body.style.border = '5px solid red';"
});
}
Learning More
To learn more about working with tabs in the SDK, see the
tabs
API reference.
To learn more about running scripts in tabs, see the
tutorial on using tab.attach()
.