Mozilla allows you to browse many web pages at a time using a very nice feature called “tabbed browsing”. Instead of opening a new browser window every time you want to view another page you can open a new tab.
Clicking on this button (at the left end of the
tab list), or choosing
+ -> from the
menu, will open a new tab. You can now input the URL or select a
bookmarked site to browse that site in the new tab. Keyboard
shortcut: Ctrl-T.
Use this button (at the right end of the tab
list) to close the currently displayed tab. Click on a tab's title
to display the contents of that specific tab.