Besides its slowness, one big problem of Firefox to me is whenever I leave the app (e.g. looking up a translation in a dictionary) and switch back via ALT-TAB or long press HOME, Firefox reloads all tabs, they are already empty when reopening Firefox (so Ff seems to lose the tabs and only saves the URL's).
Is this due to low memory of Smartphone (500 MB RAM) or does Ff show the same behaviour on Tablets and high-specs smartphones? I also need Ff for Tiddlywiki and switch between apps and reopen Ff quite a lot. So a solution/explanation for this problem would be fine.