If you are fed-up from just clicking to give access and all. Here is just the simple trick that will make you happy. This will work in Salesforce Classic. Just past the below code in Address Bar and you will see the magic

javascript:var inputs = document.querySelectorAll("input[type='checkbox']");for(var i = 0; i < inputs.length; i++) {inputs[i].checked = true;}  alert('├žompleted')

Post Content Credit : I must thanks to my friend Sai Parjanya for this article