> As a first step, browsers should make extensions more powerful again. First, do note that hooking JS into everything also means a considerably less efficient

> As a first step, browsers should make extensions more powerful again. First, do note that hooking JS into everything also means a considerably less efficient browser. Extensibility has an overhead, extensibility in JS a much greater one. Second, I don't see reason why something like this would ever be an extension, and not just default browser behavior. Are you viewing the page? Then it doesn't get to run unless you specifically allow it. OR, make noscript the default state. There are very few websites that doesn't actually work just fine, and much faster without javascript enabled.