imagine you have 30 tabs opened you want to read later,
then you open a new opera window with another tab,
you now need to close the computer and you closed first the 30 tabs window, and then the tab with the single tab,
Yo are done, next time you open the browser all you get is the single saved tab...
Please someone add a feature so this doens't happend, and all open tabs, (no matter if they are in diferent opera windows) should be saved until they are close one by one,
i lost some quite important tabs i can't recall and is not fun a tall