Extensions
Essential Extensions
select others from my list (see right column)
Help > Help Contents > Customization > Extensions
[Menu: Tools > Extensions > Get more extensions (link)] -- takes you to the extensions website
Watch for the information bar (below the tab bar) for installation notices
(also shows up for popups)
Where to look for the "handles" on extensions:
Tools > Extensions
Right-Click (menu bar) > Customize > Drag-n-drop Icons
"Tools" Menu
Status bar (bottom of window)
More on extensions: