The sidebar gives you quick access to sites related to the one currently displayed, search engines, your bookmarks, history and more if customized. You can hide/show it by selecting the + -> sub-menu or by using the F9 key.
The sidebar is arranged in tabs. We will only detail some of them, so feel free to investigate tab customization by selecting -> from the sidebar's menu.
What's Related. Under Related Links is a list of the sites somehow related (for example: same subject, same keywords, etc.) to the one currently displayed. Click on the link you are interested in and the linked site will be displayed in Mozilla's Page Display Area. The related sites list will be automatically updated to reflect the new site you browsed to.
Search. Enter the text to search for and click on the Using pull-down list[4]. The Search Results field will display links to sites matching your search criteria. Only a limited number of search results are displayed, and using the and buttons will let you access more results for the same search.
button to start it using the search engine you've selected in theBookmarks. In order to conveniently access your bookmarks, it is handy to display them in the sidebar. Clicking on Add... will add a bookmark for the site currently displayed. Clicking on Manage will bring up the bookmarks manager (see the section called “Managing Bookmarks”) and clicking on Search... will open a window to search for bookmarks based on name, location, description or keyword.
History. Mozilla keeps track of the URLs you have visited in the past N days, where N is a number that can be configured (the default is set to 9 days). To change how many history days to keep, choose -> from the menu and open the History sub-section of the Navigator section. If you want to return to a site you visited a week ago, look for the 7 days ago entry, open it by clicking on the plus (+) sign and search for the URL which interests you. Clicking on it will open the site in the Page Display Area.
[4] The default search engine (which is Google) and other search options can be changed by accessing -> from the menu. Go to the Internet Search sub-section of the Navigator section