Are your tab groups remembered after a browser crash? YouTube has a tendency of crashing Firefox/FF forks (incl. Waterfox and Pale Moon). I'm forced to restart

Are your tab groups remembered after a browser crash? YouTube has a tendency of crashing Firefox/FF forks (incl. Waterfox and Pale Moon). I'm forced to restart maybe once every other or every third week after YouTube hangs the browser. When this happens I lose all of my tabs which is completely unacceptable for me. Tabs were also lost when updating the browser which was the straw that broke the camel's back and caused me to ditch Pale Moon and return to Firefox. If those two issues have been fixed I'd likely very quickly switch back to Pale Moon. As an aside, I'm aware FF is removing them as well in the near future. I've already frozen myself on FF 40 for other reasons. Before anyone mentions - I'm aware of the potential security risks of doing so and have decided given my internet browsing habits it is very low risk. Low enough that I don't even consider publicly announcing my use of FF40 to be a significant security threat.