We're currently looking at a way to pop the links into a new window.
In the meantime, you can be careful not to close the window as you have explained, or alternatively when opening a link, instead of clicking the left-mouse button, click the right mouse button and select "Open link in new window".
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)