While it might seem advantageous to max out this setting, there is a point of diminishing returns. Browser.cache.memory.capacity - MozillaZine Knowledge Base
that determines how much system RAM (memory) the browser can use to store web pages, images, and scripts for instant retrieval. Unlike the disk cache, which stores files on your hard drive, the memory cache is significantly faster but is cleared every time you close the browser. 1. How to Access the Setting Browser.cache.memory.capacity
To modify the value of browser.cache.memory.capacity , follow these steps: While it might seem advantageous to max out