Mozilla Firefox: go to `Tools > Addons > Extensions`, locate the toolbar and click `Remove`.
Google Chrome: click the menu icon in the upper-right area under the close button, then go to `Tools > Extensions` and click the bin found next to the toolbar entry.
Internet Explorer: go to `Tools > Manage Add-ons > Toolbars and Extensions`, locate the Toolbar and click `Disable`.
Safari: The toolbar is only available for Mac OSX and you can uninstall it by opening Applications folder and dragging its icon to the Thrash.