Never Lose Your Favorite Quotes

Why?

It would be very useful to immediately be able to highlight something you read, and have it in an online library with a link to the original document.

How?

Have an  iPhone extension (and comparable solution on Android phones) you can use when you read something and would like you can invoke when you selected a text in a document that has a URL. When invoked the extension should save the selected text with a link to the original document URL in your own online repository that you can access anytime on the web or with the app of the extension.