To understand this setting, we must first understand the difference between and Disk Cache .
browser.cache.memory.capacity is a hidden configuration preference in Firefox that determines the maximum amount of RAM (in kilobytes) the browser can use to store decoded images, scripts, and other web assets for immediate retrieval. Unlike disk cache, which persists on your storage drive, this memory cache is volatile and cleared every time you close the browser. mozillaZine Key Functionality Default Behavior (-1): By default, this value is set to Browser.cache.memory.capacity
Open Mozilla Firefox. Step 2: Type about:config into the address bar and press Enter. Step 3: Click "Accept the Risk and Continue" (warning: advanced settings are dangerous). Step 4: In the search bar, type browser.cache.memory.capacity . Step 5: You will see one of two things: To understand this setting, we must first understand
Users can set a custom value (in ) by creating or modifying this integer preference. Step 4: In the search bar, type browser
For Mozilla Firefox users, one such hidden treasure is the preference . This seemingly obscure setting determines exactly how much of your computer’s RAM (Random Access Memory) Firefox is allowed to use for storing web data temporarily.
Memory caches can contain remnants of visited pages. If you are on a shared computer and are deeply concerned about forensic recovery after a session, you might set this to 0 to ensure no web data lingers in RAM during your session—though this will dramatically slow down browsing.