When browing, I usually open a lot of tabs. I keep the tabs opened and leave browser, then I return to mozilla to finish browsing. But when I leave the tabs opened for a few days, then I found that the tabs are closed automatically (even though I use mozilla at that time) Please fix the problem, otherwise, all the tabs can't be found on the "recently closed tabs". And the browsing history stays for only 7 days, why? Maybe it'll good to stay all the history. Please fix the problems, mozilla is amazing browser, I really like it but I'd like to have the full history & I hate to see that I opened mozilla & my all tabs are gone, also from the "recently closed tab"