Here is some collection of shortcuts that you can use the Mozilla Firefox Browser :
F5 = Refresh web page
Spacebar = Scrolling / Scrolling down the page
Spacebar + Shift = Scrolling / Scrolling the page up
Ctrl + F = Displays a search box (at the bottom)
Alt-N = next Searching
Ctrl + G = Go to address bar
Ctrl + = Zoom the font size / font
Ctrl + - = Decrease font size / font
Ctrl+Shift+T = Undo close tab (re-open the last closed tab)
/ = Open the "Find Text As You Type" widget (bottom of screen)
' = Open the "Find Links As You Type" widget (bottom of screen)
Esc = Close the search box
Ctrl + D = Doing Bookmark this site
Ctrl + T = Open a new tab
Ctrl + W = Close tab
Ctrl+Tab = Switch to the next tab
Ctrl+Shift+Tab = Switch to the previous tab
Ctrl+[0-9] Switch to the 1st, 2nd, 3rd, 4th, etc. tabCtrl + K = Go to the search box
