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This addon originally is based on a gist by Paul Rouget, a Firefox devtools team member.

Click the Toolbar Button (originally in add-on bar, can be changed), or choose from the Developers Tools menu under Tools Menu (or Firefox Menu), or even Press "Ctrl + Shift + M" shortcut to bring upon the Magnifier.
To close the Zoom panel, either press Escape, click on the button again, or hit the shortcut (Ctrl + Shift + M) again.

Some of the key features of Magnifier are :

Future plans include a ruler along the sides of the webpage, full integration with the Inspector Developer Tool of Firefox and enhanced color picking and palette support.

For any issues or queries, please visit the github page here.

Download files:


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