Click on the image and the document will open in a new browser tab.
When finished, simply close that document tab by clicking the X on it.
It will return to this website tab (page) which remains open in the background. If it doesn't happen, just click on this tab.
Tap the image and the document will open in a new browser tab.
When finished, tap the square box with a number at the bottom or top of your browser. This shows all your open tabs.
Tap the X on the document tab to close it and, then, tap the website tab to return.
Tap the image and the document will open in a new browser tab.
When finished, tap the < sign at the bottom or top of your browser to return to the previous page.