One of the quickest ways for reading foreign text without having to leave the website you're reading is Readlang. Readlang is a webapp and Chrome extension that helps you learn by translating web sites and creating flashcards and word lists for you.
For example, find a website in the language of your choice. Hover over a word that you don't know and the English text will appear above it. It saves a lot of time having to look it up on another app, online dictionary, or analog dictionary.