GoFullPage is a simple extension for taking full-page screenshots of websites. It handles all the scrolling and at the end allows you to export the website to png, jpg, or pdf.

This dead-simple extension allows you to block distracting websites for a period of time your specify. You get to decide which websites to whitelist and which ones to blacklist. Block & Focus comes with statistics, keyboard shortcuts, breaks, and a few other functionalities but is overall a really simple and effective tool.