OK, the problem is tied to using a Launchpad feed as a live bookmark in firefox. Thanks Tim for the hint.
I have http://feeds.edge.launchpad.net/bzr/branches.atom as a live bookmark. Every time firefox reloads it, I get a new edge session cookie. It's 100% reproducible if I manually choose 'reload live bookmark' and automatic polling would probably give the observed behaviour of being logged out about every hour.
OK, the problem is tied to using a Launchpad feed as a live bookmark in firefox. Thanks Tim for the hint.
I have http:// feeds.edge. launchpad. net/bzr/ branches. atom as a live bookmark. Every time firefox reloads it, I get a new edge session cookie. It's 100% reproducible if I manually choose 'reload live bookmark' and automatic polling would probably give the observed behaviour of being logged out about every hour.