UI Tweaker is a Firefox extension that enables users to modify various components of the web browser's user interface. It was previously known as Toolbar Cleanup.
One of the key strengths of UI Tweaker is its ability to remove various items from the browser's menus and toolbars. For example, you can easily remove the "For Internet Explorer Users" option from the Help menu, as well as the "Release Notes" option. You can also remove the "Go" menu (or "History" menu in the nightly builds), as well as options like "Read Mail" and "Web Search" from the Tools menu.
In addition to this, UI Tweaker also allows you to tweak various design elements of the browser's UI. For example, you can remove the toolbar separators, the forward and back button drop down arrows, and the close button from the tabbar (in version 1.5 and later). You can also make the address bar corners slightly rounded, and hide the Search Bar unless the mouse hovers over it.
Other useful features of UI Tweaker include multi-row bookmark toolbars, the ability to show only icons on the bookmark toolbar, and the option to combine the stop and reload buttons. You can also relocate the tabbar to the bottom of the screen, add a keyword when adding a bookmark, and move the sidebar to the bottom.
Finally, UI Tweaker also includes a range of settings that improve your privacy, such as the ability to turn off autocomplete in various fields, remove the security padlock icon, and remove the RSS Feed icon from the location bar. With so many useful features and powerful customization options, UI Tweaker is a must-have tool for anyone serious about optimizing their browsing experience.