Here is a list of shortcuts:
CTRL + A Select all text on a webpage
CTRL + B Open the Bookmarks sidebar
CTRL + C Copy the selected text to the Windows clipboard
CTRL + D Bookmark the current webpage
CTRL + F Find text Within the current webpage
CTRL + G Find more text Within the Same webpage
CTRL + H opens the webpage History sidebar
CTRL + I Open the Bookmarks sidebar
CTRL + J opens the Download Dialogue Box
CTRL + K Places the cursor in the Web Search box ready to type your search
CTRL + L Places the cursor into the URL box ready to type a website address
CTRL + F opens your mail program (if you have one) to create a new email message
CTRL + N opens a new Firefox window
CTRL + O Open a local file
CTRL + P Print the current webpage
CTRL + R reloads the current webpage
CTRL + S Save the current webpage on your PC
CTRL + T opens a new Firefox Tab
CTRL + U View the page source of the current webpage
CTRL + V Paste the contents of the Windows clipboard
CTRL + W Closes the current Firefox Tab or Window (More Than if one tab is open)
CTRL + X Cut the selected text
CTRL + Z Undo the last action
