You can easily take a screenshot on Google Chrome using the Lightshot extension.
In Google Chrome, open the following link: Lightshot – Chrome Web Store and click Add to Chrome:

Now click on the LightShot icon:

Select the area you want to capture, then choose the preferred option:

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Creates a link that you can use to upload the desired image.
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Copies the image to the clipboard that you can paste wherever you need.
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Saves the image as a file on your local device.
Additional Resources