I hope this is the right place to ask. If not I will delete and ask somexhere else (where though?). I noticed there is a star I can click next to vote arrows close to questions title. So I thought I could bookmark them this way, but I cannot see any effect, nor can I find a list where those marked questions would appear. I am using a mobile phone, Firefox 66 on Android. Thanks.
EDIT: While the duplicate question does exist, there is no valid answer there. The favorite tab is absent from my layout, as far as I can tell. Does mobile version of the site offer it?