A cache is a temporary storage space used by a computer to store frequently accessed data, such as web pages, images, and videos. Caching can improve the performance of a computer by reducing the amount of time it takes to access data. Firefox is a web browser that uses a cache to store frequently accessed web pages and other data.
There are several reasons why you might want to check the cache in Firefox. For example, you might want to clear the cache to free up space on your computer or to fix a problem with the browser. You can also check the cache to see what data is being stored by the browser.