Safari
When you have a Mac, the default browser offered by Apple is Safari. Although it does not allow you to take a screenshot of a web page natively, you can install an extension. Entitled BrowseShot, it allows you to capture web pages for free. Beware, however, that this extension does not support in-page section scrolling, such as Gmail’s mail section.
Firefox
If instead of Safari you have downloaded Firefox, be aware that on this browser this option is integrated by default using the context menu. Right-click on your web page and select “Take screenshot”. This allows you to save a portion or the entire page as an image, even if the image is not displayed entirely on the screen.
Chrome
If you don’t use Safari or Firefox, but have downloaded Google Chrome, you’ll need to go through a browser extension again. On Chrome, the GoFullPage extension allows you to take a screenshot of an entire web page by simply clicking on the dedicated icon. Once complete, you can download the capture as an image or PDF.
