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Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
View Source Code in the Same Tab 220.127.116.11-signed.1-signed
Switch between a web page and its source code easily without opening another window, just in the same tab you are. Press: Control + Shift + s and enjoy! Then press the same shortcut to gte back the webpage.
You can also cutomize the shortcut.