Unsurprisingly, the menu remains the WPWin menu, and the available Toolbars are WPWin toolbars. Examples of native toolbars are Google Toolbar and Stumbleupon Toolbar. Customizable toolbars and keyboard shortcuts were prominent features. Browser extensibility involves adding context menu entries, toolbars, menu items or Browser Helper Objects (BHO). Take Command includes a tabbed interface, configurable toolbars, and an integrated graphical file explorer. Other toolbars, known as "Deskbands", may be added to the taskbar. Opera provides toolbars that display different menus and buttons. Users can add additional toolbars that display the contents of folders. Users may be asked to install search toolbars or adware programs during installation. This installer included trojans and bloatware, such as toolbars. They were also used on the toolbars and menus by default. Prior to version 4.41 installer versions of IrfanView supported a number of browser toolbars. Thumbnail previews integrate Thumbnail Toolbars which can control the application from the thumbnail previews themselves. It is customizable, although this feature is limited, compared to toolbars in previous Office versions. Doesn't support Internet Explorer toolbars.