Monitoring the file(s) over the last couple of days, in which I've not closed the browser or rebooted the computer, the "Session" and ".dbak" files are at 5,344 KB and the "journal" file at 16 KB.
Browser, so far, runs fine, though, pending a closing and re-opening and/or a reboot of the system. It sometimes can get a day or two of good use from the browser before the Flash starts acting up. Will keep a monitor on the situation. But if it's anything like how it's been recently I'll get problems before too long.