These keys are very helpful for fast browsing and improves your working speed on Mozilla Firefox by implementing assigned shortcut keys .
Shortcut keys Operation
CTRL + A Select all text on webpage
CTRL + B Open Bookmarks sidebar
CTRL + C Copy selected text to the Windows clipboard
CTRL + D Bookmark 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 + M Opens your mail program to create a new email message
CTRL + N Opens new Firefox window
CTRL + O Open local file
CTRL + P Print current webpage
CTRL + R Reload current webpage
CTRL + S Save the current webpage on your PC
CTRL + T O pens 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
CTRL + X Cut the selected text
CTRL + Z Undo the last action
F1 Firefox help
F3 Find more text within the same webpage
F5 Reload the current webpage
F6 Toggles the cursor between the address/URL input box and the current webpage
F7 Toggles Caret Browsing on and off. Used to be able to select text on a webpage with the keyboard
F11 Switch to Full Screen mode