Firefox 3 Shortcuts (win)

1. Firefox Address and Search Bar

alt+d or ctrl+l Jump to address bar
ctrl+enter Complete a .com address in address bar: adds "http://" prefix and a ".com"-suffix, then loads the page.
shift+enter Complete a .net address in address bar: adds "http://" prefix and a ".net"-suffix, then loads the page.
ctrl+shift+enter Complete a .org address in address bar: adds "http://" prefix and a ".org"-suffix, then loads the page.
arrow up or arrow down Opens URL suggestion/ history in address bar
delete or shift+delete Deletes entries from address bar history
ctrl+e or ctrl+k Jumps to search bar if installed
alt+arrow up or arrow down Toggle search engines (in search bar)
arrow down or arrow up Select previous searches (in search bar)
del or shift+del Delete previous search entry (in search bar, works also in forms)

2. Page Navigation and Tabbed Browsing

alt+home Jump to homepage
alt+arrow left / alt+right arrow One page backward or forward
ctrl+t Open new tab in same window
ctrl+tab or ctrl+page down Jump to next browser tab
ctrl+shift+tab or ctrl+page up Jump to previous browser tab
ctrl+1 - ctrl+8 Jump to browser tab 1 - 8
ctrl+9 Jump to the rightmost tab regardless on how many tabs are open
ctrl+w or ctrl+q Close current browser tab
ctrl+shift+t Undo close browser tab

3. Working inside Web Pages

alt+d, then press tab twice (or three times) Get "focus" on webpage for in-page keyboard navigation. Note the dotted frame around the page
arrow down / arrow up Scroll websites up or down one line
page down / page up Scroll websites up or down one page
tab / shift+tab Jump to next or previous link
enter Open selected link in current tab
shift+ctrl+enter Open selected link in new foreground tab
ctrl+enter Open selected link in new background tab
shift+enter Open selected link in new window
alt+enter Download selected link
ctrl++ / ctrl+- Increase or decrease text size
ctrl+0 Default text size
f5 or ctrl+r Reload page
ctrl+f5 or ctrl+r Reload page with cache override
escape Stop loading page
f6 / shift+f6 Go to next frame (tab and shift + tab seems to be easier)
shift+f10 Open context menu of a hyperlink. Press arrow up or down or initial letter to select command
f7 Turn caret mode on/off (navigation with keyboard)
ctrl+a Select all, useful to copy and paste text out of websites
ctrl+c Copy selected text
ctrl+p Print
alt+f, then v Print preview
ctrl+u Show page source
ctrl+s Save page as
ctrl+f or / Open "quick find" window and searches phrase as you type
' (apostrophe) Open "quick find" (links only) window
ctrl+g or enter or f3 Find next occurrence of search term. enter will not work for quick find links only
ctrl+shift+g or shift+f3 Find previous occurrence of search term.
escape Close search window

4. Manage the Firefox Windows

ctrl+n or alt+f+n Opens new browser window
ctrl+shift+w or alt+f4 Close browser window
alt+space Opens the title bar menu (default Windows feature)
alt+space+enter Restore Window (default Windows feature)
alt+space+x Maximize Window (default Windows feature)
alt+space+n Minimize Window (default Windows feature)
f11 Turn full page view on or off (default Windows feature)

5. Access Firefox Features

ctrl+j Open or close download window
ctrl+h Show or hide browsing history
ctrl+b or ctrl+i Show or hide bookmark sidebar
ctrl+d Add bookmark
ctrl+shift+d Bookmark all tabs. In the "create in" menu, use alt+down to choose bookmark destination
alt+b, then press a-z or number Open bookmark menu and press first letter of a bookmark name to load them. More than one entry with the same letter, requires to repeatedly pressing the letter and hit enter
ctrl+shift+del Clear private data (menu)
ctrl+o Open file
f1 Firefox (online) help
alt+f Open file menu
alt+e Open edit menu
alt+v Open view menu
alt+s Open history menu
alt+b Open bookmark menu
alt+t Open tools menu
alt+h Open help menu

6. Forms in Firefox

tab / shift+tab Jump to next or previous form element
space Activate or deactivate radio buttons and check boxes
alt+arrow down Select from a drop-down menu
ctrl+c, ctrl+x and ctrl+v Copy, cut or paste selected text (when working in forms)
arrow up / arrow down Select previously used form entries
shift+delete Delete previously used form entries