So ...

We are going to use a smart little plugin called Browser Screenshots.

Here it is:

https://wordpress.org/plugins/browser-shots/

The plugin uses the [browser-shot] shortcode to automate the process of taking website screenshots. An icon is also added to the Classic Editor editor to make the shortcode creation process even easier.

And as I said, you'll be able to pre-customize the automated screenshots using various parameters. Here they are:

• url (required) – the url of the link to shorten
• width – the width of the image
• height – the height of the image
• alt – the image alt text
• link – where the image links; left blank it will point to the website where the screenshot is being taken
• target – browser target; set to _blank to open in a new window
• class – add a class to the browsershots wrapper
• image_class – change the default browsershots image class from alignnone to your chosen class

It's a very small plugin (7 KB), but let's see the usual speed tests ...

Here are my results before installing the plugin ...

... and the result after installing and activating the plugin:

As you can see, the plugin is almost invisible. No more comments needed ...

Now let's see how it works ...