We have a number of computers where the users have Standard accounts (not admin) and the Firefox auto updates. But I have noticed that Firefox(version 56.0 32 bit) is now not auto updating, clicking check for updates just reveals the text "Updates available at https://www.mozilla.org/firefox" I know that version 57 and 58 have long been available. Why is this happening? Standard users are unable to download and update the new version themselves.