The Firefox add-on Speed Dial adds a “New Tab” page in the browser that gives you direct access to your favorite websites. The bookmark displays the plugin as tiles that show you the current content of the page if you wish. You can either add new entries manually or list the currently open tabs or the pages most popular with other users.
For a better overview, create groups that you individually name and fill with bookmarks. With “Speed Dial” you also have access to the pages you visit most often, as well as the recently closed tabs. In the settings you define the behavior as well as the appearance of the extension according to your needs and define if necessary a password, in order to protect your bookmarks from foreign eyes.