Recent answers to Changing the stored cache sizehttps://support.mozilla.org/ga-IE/questions/12198332018-05-30T05:59:36-07:00You will have to modify the related pref(s) directly on the about:config page.
browser.cache.disk.c2018-05-30T05:59:36-07:00cor-elhttps://support.mozilla.org/ga-IE/questions/1219833#answer-1117148<p>You will have to modify the related pref(s) directly on the <b>about:config</b> page.
</p>
<ul><li>browser.cache.disk.capacity (max: 1048576; 1024 MB)
</li><li>browser.cache.disk.smart_size.enabled
</li></ul>
<p>You can open the <b>about:config</b> page via the location/address bar.
You can accept the warning and click "I accept the risk!" to continue.
</p>
<ul><li><a href="http://kb.mozillazine.org/about:config" rel="nofollow">http://kb.mozillazine.org/about:config</a>
</li></ul>