: Users with 32GB+ of RAM often manually crank this up (e.g., to 524288 for 512MB) to ensure that even complex, media-heavy tabs never have to "re-fetch" data from the slower SSD. Why People Change It The "story" usually follows one of two paths:
The browser.cache.memory.capacity integer specifically controls the maximum size of this fast-access RAM cache in . Why Adjust It? Browser.cache.memory.capacity
Based on the preference name Browser.cache.memory.capacity , this appears to be a low-level browser setting (historically from Mozilla/Firefox) that controls the maximum size of the in-memory cache. : Users with 32GB+ of RAM often manually crank this up (e