Image selection via Web Activity on Firefox OS

MozActivity.js

if ('MozActivity' in window) {

	document.getElementById('my-file-input').addEventListener('click', function(evt) {
		evt.preventDefault();

		var picking = new MozActivity({
			name: 'pick',
			data: {
				type: 'image/jpg'
			}
		});

		picking.onsuccess = function() {

			// this.result.blob holds the File reference
			
			// Blob and XMLHttpRequest2
			// https://developer.mozilla.org/en-US/docs/DOM/XMLHttpRequest/Sending_and_Receiving_Binary_Data

			// Getting the image data
			var img = new Image();
			img.onload = function() {
				// Draw image to canvas for resizing or similar
			}
			img.src = URL.createObjectURL(this.result.blob);
		};

		picking.onerror = function () {

			console.log('No image!');
		};
	});
}