Rather excellent firefox discovery regarding reopening closed tabs

I feel I should mention that I am learning PHP.
So it appears is the rest of the country - from grannies on estates outside Manchester to surfers in Cornwall. Everyone is having a go. So there you go. Expect complex data-driven homepage by end of year.

All of which is entirely irrelevant to my discovery of CTRL+SHIFT+T. Which is a brilliant - if hidden - shortcut that immediately reopens the tab (and url) of the page that you last closed (almost always accidentally and without making a note of where on earth you were). Frankly it will save me many minutes and generally contributes to the good of humanity.
I am for it!