Orion has crashed multiple times for me out of a sudden, but that's okay. It sometimes happens for me with other browsers too. However, the difference between how Orion handles the crash vs other browsers is what needs an improvement. Other browsers like Chrome and Firefox always show a prompt with a button, if you click it then all the pages (or tabs) that were previously opened before the crash are restored. Not only that but it also restores the cached version. I mean I have CookieAutoDelete extension, so I get logged out everytime the browser quits but restoring the pages using that button restores the logged in version of that website as well. So it's not just opening the URLs again, but restoring the cookies and cache as well as far as I understand the tech things behind it.
Also, note that some users tried to suggest about the setting of always opening previous tabs/pages when Orion restarts. That is totally different from this. This feature in other browsers gives you a prompt ONLY when the browser crashes. I think this should be implemented because I've lost progress many times during my research using Orion when the browser crashed. Below is the screenshot of that prompt on Chrome as an example.