This problem exists for webkit browsers only chrome and possibly safari (i’ve not tested it in). As you can the demo below, you will see the extra space on left and right side of pdf file loaded within an iframe.
This problem exists for webkit browsers only chrome and possibly safari (i’ve not tested
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I think that happens when a pdf is rendered by the chrome’s default pdf viewer. You can resolve this issue If disable the default pdf viewer and install the new pdf viewer like adobe acrobat. You can disable the default viewer by going to `about:plugins’ in the browser tab and click the disable link shown below ‘Chrome PDF Viewer’.