When I right-click a tab, among the many options I see, I'd like one that allows me to prevent the tab from being closed accidentally. A padlock or another color might appear; the tab can only be closed with my explicit permission. Likewise, if I try to close a window with many tabs, it won't be able to close if I have one or more "locked" and I don't give permission to close it. Automatic blocking could be enabled for certain sites; when I have multiple locked tabs and close the entire window, it will have to ask permission individually, but it could also be enabled to "don't ask again for each tab," etc. (I used the translator, I hope the English is clear!). Thank you!