I want Firefox to be able to cache webpages such that I can read the pages later after a restart. I've tried setting the cache size to 350MB but it still doesn't work as intended. Opera seems to do it without a single tweak. It can display an SO question even after closing and restarting it while Firefox demands a reload.
How do I make Firefox behave like Opera in this scenario? I'd hate to switch to Opera since it has a tendency to crash when I open many tabs, plus Firefox's addons are to die for.