Sometimes you need to take an screenshot of the whole webpage but you realize that your common screen captor only captures what's on screen and you need to take screenshots of the whole page, not only a part. That's the moment when you need Webpage Screenshot.
When you'll need to take it, just click the photo-camera icon that will appear next to the address bar and choose the option you want: capture window or capture complete webpage.
Once you'll have captured the screen a new window will appear where you will be able to edit it. then, save it as JPG or share it in social networks.
Webpage Screenshot is really useful when you want to take screenshots of complete pages.