Google Chrome Shortcut keys

Ctrl+N	Opens a new window.
Ctrl+T	Opens a new tab.
Ctrl+Shift+N	Opens a new window in incognito mode.
Press Ctrl+O, then select file.	Opens a file from your computer in Google Chrome.
Press Ctrl and click a link. Or click a link with your middle mouse button (or mousewheel).	Opens the link in a new tab in the background .
Press Ctrl+Shift and click a link. Or press Shift and click a link with your middle mouse button (or mousewheel).	Opens the link in a new tab and switches to the newly opened tab.
Press Shift and click a link.	Opens the link in a new window.
Ctrl+Shift+T	Reopens the last tab you've closed. Google Chrome remembers the last 10 tabs you've closed.
Drag a link to a tab.	Opens the link in the tab.
Drag a link to a blank area on the tab strip.	Opens the link in a new tab.
Drag a tab out of the tab strip.	Opens the tab in a new window.
Drag a tab out of the tab strip and into an existing window.	Opens the tab in the existing window.
Press Esc while dragging a tab.	Returns the tab to its original position.
Ctrl+1 through Ctrl+8	Switches to the tab at the specified position number on the tab strip.
Ctrl+9	Switches to the last tab.
Ctrl+Tab or Ctrl+PgDown	Switches to the next tab.
Ctrl+Shift+Tab or Ctrl+PgUp	Switches to the previous tab.
Alt+F4 or Ctrl + Shift + W	Closes the current window.
Ctrl+W or Ctrl+F4	Closes the current tab or pop-up.
Click a tab with your middle mouse button (or mousewheel).	Closes the tab you clicked.
Right-click, or click and hold either the Back or Forward arrow in the browser toolbar.	Displays your browsing history in the tab.
Press Backspace, or Alt and the left arrow together.	Goes to the previous page in your browsing history for the tab.
Press Shift+Backspace, or Alt and the right arrow together.	Goes to the next page in your browsing history for the tab.
Press Ctrl and click either the Back arrow, Forward arrow, or Go button in the toolbar. Or click either button with your middle mouse button (or mousewheel).	Opens the button destination in a new tab in the background.
Double-click the blank area on the tab strip.	Maximizes or minimizes the window.
Alt+Home	Opens your homepage in your current window.

Mozilla Firefox shortcut keys

Shortcut Keys	Description
F5	refresh current page, frame, or tab.
F11	Display the current website in full screen mode. Pressing F11 again will exit this mode.
Esc	Stop page or download from loading.
Spacebar	Moves down a page at a time.
Alt + Home	Open your homepage.
Alt + Down arrow	Display all previous text entered in a text box and available options on drop down menu.
Alt + Left Arrow	Back a page.
Alt + Right Arrow	Forward a page.
Ctrl + (- or +)	Increase or decrease the font size, pressing '-' will decrease and '+' will increase. Ctrl + 0 will reset back to default.
Ctrl + D	Add a Bookmarkfor the page currently opened.
Ctrl + F	Access the Find option, to search for any text on the currently open web page.
Ctrl + H	View browsing history.
Ctrl + I	Display available bookmarks.
Ctrl + J	Display the download window.
Ctrl + K or Ctrl + E	Move the cursor to the search box.
Ctrl + N	Open New browser window.
Ctrl + O	Access the Open File window to open a file in Firefox.
Ctrl + P	Print current page or frame
Ctrl + T	Opens a new tab.
Ctrl + F4 or Ctrl + W	Closes the currently selected tab.
Ctrl + F5	Refresh the page, ignoring the Internet cache (force full refresh).
Ctrl + Enter	Quickly complete an address. For example, type computerhope in the address bar and press CTRL + ENTER to get http://www.computerhope.com.
Ctrl + Tab	Moves through each of the open tabs.
Ctrl + Shift + Del	Open the Clear Data window to quickly clear private data.
Ctrl + Shift +	Open the Bookmarks window, to view all bookmarks in Firefox.
Ctrl + Shift + P	Open a new private browsing window.
Ctrl + Shift + T	Undo the close of a window.
Ctrl + Shift + W	Close the Firefox browser window.
Shift + Spacebar	Moves up a page at a time.

Facebook Shortcut keys

Win & Chrome	Win & Firefox	Win & IE	OSX & Firefox	OSX & Other
Alt	Alt + Shift	Alt	Function + Ctrl	Option + Ctrl

M	Open a new message *
?	Go to the Facebook Search
1	Home (News Feed)
2	Your profile page
3	Friend requests
4	Messages
5	Notifications
6	Your Account Settings
7	Your Privacy Settings
8	Go to the Facebook page
9	View Facebook Statements and Rights agreement
0	Open Facebook help center