This script extends the console object in the browser and allows you to save JSON objects to your desktop. I find this to be very useful for web scraping.

The way it works is it creates a phantom download link to a Blob of the JSON object and spoofs the user clicking it. You can use it by copy and pasting the script into the console, or use it programmatically by including the file.

Console

// paste cs.js in here to gain access to console.save

var data = { 
  foo: "bar",
  baz: "qux"
};

console.save(data, 'data.json');

data.json

{
  "foo": "bar",
  "baz": "qux"
}