Browser cache capacity set from Armory?

Do you know how to set the browser-cache-disk-capacity for the Firefox browser from Armory :control_knobs: ?
(in Firefox, manually we can modifiy it using about:config in the adress bar, but when restarting a new Armory appli in this browser, this value resets to default 358 400 … or if you know how to not reset too ?)

another way to expose the problem is when you get this message in Firefox:

cannot enlarge memory arrays. Either (1) compile with -s TOTAL_MEMORY=X with X higher than the current value 67108864, (2) compile with -s ALLOW_MEMORY_GROWTH=1 which allows increasing the size at runtime but prevents some optimizations, (3) set Module.TOTAL_MEMORY to a higher value before the program runs, or (4) if you want malloc to return NULL (0) instead of this abort, compile with -s ABORTING_MALLOC=0