The Firefox Add-on ViewMarks offers an alternative way to organize and use your bookmarks. It automatically captures a preview image of the web page when creating a bookmark. You can then easily manage all your bookmarks in web page views. Go to download page ...

With the Firefox Add-on FlexBar you can easily configure the visibility of all menu bars, sidebars and information bars. For every element you can adjust separately whether it is shown never, always or automatically. The automatic display mechanism can be globally deactivated. Optionally you can display additional small navigation buttons on left side of the Tab Bar. These buttons offer an identical funtionality to the buttons in the Navigation Toolbar. More informations ...