ff 37 on windows i want to move all disk cache to RAM currently i'm using a RAM disk to do this, but i am unclear as to whether this is actually necessary with the newer FF versions and what some of the prefs should be set to current settings: browser.cache.disk.enable = true (since i'm using a RAM disk) browser.cache.disk.parent_directory (points to the RAM disk obviously) browser.cache.disk_cache_ssl = true browser.cache.memory.enable = true (no idea what this should be when disk cache is in RAM) browser.cache.memory.capacity = (unset) network.http.use-cache = true Q1: if i dump the RAM disk, can i still preserve and move all cache to ram and, if so, what should the browser.cache.memory.* prefs be set to? Q2: if the RAM disk is still necessary to preserve the disk cache, what should browser.cache.memory.enable and network.http.use-cache be set to? i would rather combine the memory and disk cache in RAM if possible, but do not want to lose either. Q3: i have read that disabling disk cache is a no-no as far as performance is concerned since the browser and/or plugins need to access some cache files by file name (such as Adobe PDF reader), but apparently this may have changed at some point - what is the status of this? Q4: if disk cache is disabled and memory cache is limited to, say 200 MB, what happens when i load a 1 GB video? Q5: what should browser.cache.memory.max_entry_size be set to? REFERENCES: https://support.mozilla.org/en-US/questions/1049978 http://kb.mozillazine.org/Browser.cache.disk.enable http://kb.mozillazine.org/Browser.cache.memory.capacity http://kb.mozillazine.org/Network.http.use-cache UPDATE: looks like i might have answered some of my own questions, but would still like confirmation and help with the above mentioned prefs i set browser.cache.disk.enable = false and set a value in KB for browser.cache.memory.capacity in about:cache for both mem and disk cache, i see "Storage disk location: none, only stored in memory" which seems to suggest that 1) no disk cache is lost by moving all cache to mem and 2) a RAM disk is no longer necessary with newer FF builds (what "newer" is i'm not sure)