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View Source Code in the Same Tab 220.127.116.11-signed.1-signed No Restart
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.
About this Add-on
* Added preference to not reload the page when getting back from the source code view: using browser capability to go back in history instead.