Comment You forget memory usage... (Score 4, Insightful) 218
When you load a javascript library the browser has to allocate memory to every function in the library even if they are never used and most web sites are using dozens of javascript libraries. While this is ok on a desktop, on a tablet - which has much less memory - it means you only have enough memory to have one web page open at a time. Some web pages are so infested with javascript libraries they cause the tablet browser to crash. And they are just displaying static text and images, something that doesn't require javascript.