Description of problem:
Firefox always starts in offline mode, even when the network is working and it was in online mode when it was last used.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Put firefox in online mode
2. quit and restart firefox
"Firefox is currently in offline mode and cannot browse the web" appears in all tabs, and File->Work Offline is checked
Tabs should load whatever they were pointing to when I last quit firefox.
I suspect that this may have something to do with my having "Controlled by NetworkManager" unticked for eth0 in system-config-network. Is Firefox assuming that since there is no "managed" network connection, there must be no network connection at all?
Correct. If you are not letting NetworkManager control your interface because of a failing in NetworkManager, please consider filing a bug against it so we can fix it.
If you don't wish to use NetworkManager at all, you should consider turning off the service completely, via either system-config-services or via chkconfig.
Alternatively, if you need to use NetworkManager for some interfaces, you might consider setting the following preference: toolkit.networkmanager.disable to true.