You will need to install a user script manager extension to install this script.
Allows the image opened in the new tab to zoom independently without affecting the original page.
Ctrl + middle mouse button to zoom the picture separately.
Allow keyboard shortcut substitution.
Ctrl + =: zoomIn
Ctrl + -: zoomOut
Ctrl + Alt + 0: restore
Ctrl + 0: adapt
When you click on the zoom value element: