Cachebuster adds a query parameter to all HTTP requests made by your browser to bypass load balancer/proxy caches. For example, an HTTP request to URL http://yasa.gs/ will actually be made to the URL http://yasa.gs/?cachebusterTimestamp=1383291810660. Especially useful in scenarios where manual QA for web apps is performed in a corporate environment, which usually feature heavy caching via load balancers or proxies. Without this extension, testers might not see the latest changes.