Mozilla have updated their Firefox browser to version 30 on all supported platforms today.
The update adds three new features to the browser:
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Support for GStreamer 1.0
You can find the sidebar button on the toolbar, which is next to the address bar. It allows you quick access to your bookmarks and your browsing history.
If you have a lot of icons on the toolbar (from addons), you may not find the Sidebar button on the bar. Right click on the bar and select customize, and you will find the button there. Just drag it to the bar for quick access.
The following changes were also implemented in the update:
Disallow calling WebIDL constructors as functions on the web
With the exception of those bundled inside an extension or ones that are whitelisted, plugins will no longer be activated by default.
The download button on main page of the Firefox website, still links to the previous version: 29.0.1. So you can download Firefox 30 (for Windows, Linux, and Mac) from the official Mozilla servers instead.