As a developer with a probably a hundered tab open at a time, these are some of the keyboard shortcuts which have come in handy a lot.

• Ctrl + Shift + t - Opens previously closed tab in browser!
• Ctrl + d - Add bookmark for current tab (will put the bookmark in the last folder location you chose automatically)
• Ctrl + w - Closes the current tab
• Ctrl + Shift + w - Closes the current window
• Ctrl + T - Opens a new tab
• Ctrl + K - moves cursor to the address bar and changes the address bar to a google search.
• f12 - Opens the developer tools
• Ctrl + h - Open the History page in a new tab
• Ctrl + j - Open the Downloads page in a new tab
• Ctrl + Shift + Delete - Open the Clear Browsing Data options

Are there other useful keyboard shortcuts that we should know about?