Occasionally in the past I've lost my tabs when restarting Firefox. I've been able to solve this by copying an old version of sessionrestore.js (which FF made automatically - thank you!) over the current one. However, today this does not seem to work. Unclear if this has anything to do with the recent FF update that apparently changed my look and feel (unless one of the kids changed that, though this is my personal FF profile). With FF shut down, I initially copied over the latest sessionrestore.js then restarted. It just came up with one tab on my home page. I then used windows file restore to a replace with an older previous version of sessionstore.js. I checked that this file is a lot bigger than the current one. However, again starting FF just displayed one tab on my home page. Why won't it restore tabs from an old session? FYI I did navigate to a page, restart FF and verify that it is restoring my open tabs on restart.