Just a minute ago, I was browsing the internet and typing as usual, and I got a little popup, as shown in the image.
A few days ago, on regular Firefox at work, I’d accidentally lost my tabs through misclicking to close out the whole browser window. So given I have recently had the annoyance of losing my tabs, I’m quite grateful I was saved from making a similar mistake today!
when you close firefox accidentally, you can open it again and press Ctrl+Shift+T to reopen all the tabs from the previous session.