If you are using Safari as your Web Browser, there is no need to install any third-party apps in order to capture a web page to be sent to your friend. You can just use feature of Safari, from menubar: Safari → Mail Contents of This Page.
And the whole page you're currently displayed will be sent to your new composed Mail. Aside from using the menubar, you can also use keyboard shortcut Cmd-I to do the job.
As a side note, in Safari you can always use Cmd-Shift-I to send only the link of the page to your friends.
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