Open up Developer Tools in Chrome and Firefox
Windows: Ctrl + Shift + I
Mac: Cmd + Option + I
Open up the JavaScript Console
Windows: Ctrl + Shift + J
Mac: Cmd + Option + J
View Page Source Code:
Windows: Ctrl + U
Mac: Cmd + U
Multi-Cursor Editing (Using Multiple Cursors)
Select a word or piece of code
Windows: Ctrl + D
Mac: Cmd + D
