function intersection(arr1, arr2) {
						var result = [];
						var smaller = arr1, larger = arr2;
						if (smaller.length > larger.length) {
							smaller = arr2;
							larger = arr1;
						}
						larger.forEach(function (item) {
							if (~smaller.indexOf(item)) {
								result.push(item);
							}
						});
						return result;
					}
@type {Object} A list of available vendors (browsers) and their prefixes