How to clean chrome in-memory cache?

Question

I'm developing an extension in chrome and I'm trying to perform an action each time a user searches in Google. Currently I'm using chrome.webRequest onBeforeRequest listener. It works perfectly most of the cases but some of the requests are done through the cache and doesn't perform any call. I've found this in the API documentation about caching:

Chrome employs two caches — an on-disk cache and a very fast in-memory cache. The lifetime of an in-memory cache is attached to the lifetime of a render process, which roughly corresponds to a tab. Requests that are answered from the in-memory cache are invisible to the web request API. If a request handler changes its behavior (for example, the behavior according to which requests are blocked), a simple page refresh might not respect this changed behavior. To make sure the behavior change goes through, call handlerBehaviorChanged() to flush the in-memory cache. But don't do it often; flushing the cache is a very expensive operation. You don't need to call handlerBehaviorChanged() after registering or unregistering an event listener.

I've tried using the handlerBehaviorChanged() method to empty the in-memory cache, but there was no difference. Although it's not recommended I've even tried to call it after every request.

This is my code:

chrome.webRequest.MAX_HANDLER_BEHAVIOR_CHANGED_CALLS_PER_10_MINUTES = 1000;
chrome.webRequest.onBeforeRequest.addListener(function (details) {
    //perform action
    chrome.webRequest.handlerBehaviorChanged();
} {
    urls: ["*://*.google.com/*"]
});

Is there any way to empty/disable this in-memory cache from the extension?

Answer 1

I asume the "Caching" is performed by the Google-Website with some crazy JavaScript in Objects, Arrays,... so emptying the browser in Memory-Cache won't help.

My first thought was that the data was Stored in the sessionStorage (due to the fact that the Values had the search-term in them [here I searched for test] and are updated/created on every request/change of the selected "search-word"

)

I tried clearing the Sessionstorage (even periodicaly), but it didn't really change the "not"-loading, further more the storage was recreated and even without the storage, the different results were displayed.

Due to this Information and the fact that I can't check several 1000 lines of minfied JavaScript Code, I just can asume that the website does the caching of the requests. I hope this Information can point you in the right direction.