Firefox, as almost any other program, has shortcuts that allow us to get full control of the browser, the only drawback is that shortcuts have to be memorized.
Following there is a list of the basic shortcuts everyone should know. My recommendation is that you practice all those shortcuts you don’t know.
- Ctrl + L: places the cursor on the address bar (you could also use Alt + D)
- Ctrl + K: places the cursor on the search bar (usually for searching things in Google)
- Ctrl + F: find a text on current web page
- Ctrl + R: reload current page (F5 could also be used for this purpose)
- Ctrl + T: open a new blank tab
- Ctrl + W: closes current tab (Ctrl + F4 could also be used)
- Ctrl + Shift + T: opens again the last closed tab (just to try: press Ctrl+W and then Ctrl + Shift + T)
- Alt + Enter: this is very useful if you want to open in a new tab what you are typing in the address bar. It will also work if you are selecting a page you already visited in the address bar, and then pressing Alt + Enter.
- Alt + 1/Alt + 2/ …. /Alt + 9: This is one of the basics and most usefuls shortcuts. Access to the tab 1, 2, 3… 9 of the browser, depending on the number you are using (if you don’t knew it, just press Alt + 1 and Alt+2…)
- Press the middle button of the mouse over a link: opens the link in a new tab (this is not a shortcut, but it is really useful).
The following shortcut is basic for developers (like me):
- Ctrl + Shift + R: Forces the browser to reload the whole page, images, stylesheets, … ignoring the browser caches (really useful sometimes whey you get crazy).
Finally, here there are a couple of useful shortcuts that are not that important:
- Ctrl + Tab: go to the next tab
- Ctrl + Shift + Tab: go to the previous tab
- F11: maximizes the browser to fullscreen (pressing F11 again, will restore the window)
Probably I left some other basic shortucts, if so, please let me know 
Links of interest:
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