When you navigate to a Web page and you're not using an incognito mode i.e private browsing, your Web browser loads and stores certain data, such as images, video, audio files, directly into a specific folder on your hard drive. Usually, this folder is named Cache and is located in your browser's profile directory.
The Cache lets your browser to load and render web pages you have visited previously a bit more quickly. However, over time, the size of the cache becomes too large, this may slow down your browsing speed. Also, other people who have access to your system, or a malware application that has read access to the cache, can use cached data in a negative way for their own purposes. To safeguard your privacy and speed up your browsing experience you should empty the cache periodically.
An easy way to explore or empty your browser's cache is to use the Cache Viewer. By default, the Cache Viewer shows all the files cached in your browser's cache. For each file, you can view the following information: content type, so this makes it easy to recognize a type of file, e.g image/png, video/h264, audio/ogg, text/html etc.; URL from where the file was downloaded; file size; width and height of an image in pixels, http headers, binary file data, etc.
There may be a very large number of files, so it becomes difficult to search through them. Cache Viewer provides several ways to easily find the one you want. You can search and sort files by domain and content type.
Cache Viewer is intended for personal research purposes only. Using Cache Viewer does not give you ownership of the content you access. You may not copy copyrighted content from the Cache unless you obtain permission from its owner or are otherwise permitted by law. Don't copy any copyrighted material without permission from the owner. However, you can always empty your browser's cache without any legal doubt.