#Chrome cache how to
#Chrome cache free

This exchange can add time to your browsing experience.Īlthough you may have some privacy concerns about websites having access to your personal information, cookies only store your information for a short amount of time. When you load a website, your browser sends this cookie back to the server to give the site this information. These files often improve your user experience by saving your passwords, remembering your preferences, and providing content relevant to your location. What are cookies?Ĭookies are small files created by the websites you visit to hold information about your online activity.

#Chrome cache how to

Find out how to manage your cookies and clear your browser cache for an elevated online experience. However, these functions do come with drawbacks. Many users also clear their cache when they close their browser.As the internet evolved, new functions including cookies and cache have made browsing the web or working from home faster and easier. Browsers generally have a setting for the amount of disk space they use for cache. The size of the browser's cache will probably be the limiting factor for a file that the caching algorithm determines may be kept for more than a day.

There are answers for Internet Explorer, and Webkit (Chrome and Safari). Different answers there for different browsers show that they all have similar implementations. A question has been asked on StackOveflow asking for these heuristics. It appears that all major browsers use the same 10% rule that Firefox implements. So in your case where the difference between modified and now is 15 days, then Firefox would cache the resource for 1.5 days. If this header is present, then the cache's freshness lifetime is equal to the value of the 'Date' header minus the value of the 'Last-modified' header divided by 10. Mozilla (Firefox) has an HTTP Caching FAQ that outlines their algorithm for this situation (although it is possible that the algorithm has changed since the document is dated 2002): (The heuristics are different among different browsers.)

Last-Modified is a 'weak' caching header in that the browser applies a heuristic to determine whether to fetch the item from cache or not. Google caching best practices guide states: Some browsers do use algorithms that let the page remain in cache for a day or more. When 'Expires' and 'Cache-Control' headers are not specified, but a 'Last-Modified' header is specified, browsers have to guess at how long they should keep the document in cache.

#Chrome cache free

Is that what's happening here? Chrome sees it was last modified several days ago and feels free to use a version that's (say) up to a day out of date? Or is there something I'm missing? I realize that the spec allows user agents to make their own decision in the absense of direction from the headers. (I haven't changed Chrome's caching defaults.) I can see this quite clearly in the Chrome console's Network tab, where it shows the request and has 200 (OK) in grey in the Status column and (from cache) in the Size column. I'm obviously going to recommend that they add Expires or Cache-Control as appropriate, but I'm confused: Chrome caches this resource and uses it from cache (not sending a request at all), even after several hours (for instance, it reused a copy it cached yesterday at 1:30 p.m. I have a client whose site's index.html currently comes back with these headers: Accept-Ranges: bytes