: This determines how many previously visited pages are kept alive in memory for instant back/forward navigation. Set this to -1 for automatic adjustment, or manually set it to a higher integer like 10 if you expanded your memory capacity. Troubleshooting Common Issues Firefox is Consuming Too Much RAM
In Firefox 2 and later versions, the defaults were adjusted to be more conservative, as shown in this updated table: Browser.cache.memory.capacity
Changing this setting requires accessing Firefox's hidden configuration panel, known as about:config . Step 1: Access the Configuration Editor : This determines how many previously visited pages
Completely turns off memory caching. Not recommended as it slows down browsing significantly. Positive Integer Manual Limit Sets a fixed limit in kilobytes (KB) 3. Recommended Manual Settings Step 1: Access the Configuration Editor Completely turns
Firefox dynamically scales up, often allocating 32 MB to 512 MB+ purely for the memory cache.