Today I had a power outage. When I started the computer afterwards I noticed that session recovery in firefox did not work. Even worse: History and even bookmarks seem to not have not been written for 9 days. I added bookmarks in the last days that are lost now. The reason is likely that the partition which the firefox profile resides on ran out of disk space at some point. I freeded space on that volume and firefox behaved regulary, so I expected everything would be fine. Now it seems like I lost about 10 days (open tabs, history AND bookmarks) how can it possibly be that there was no warning about issues with writing to disk in Firefox?