Firefox 3.0 Work Offline mode
Today I loaded my laptop with Ubuntu 8.04 LTS version which comes along with Firefox version 3.0b5. As soon as I installed I tried hitting http://www.google.com but I got an error which was like an error we used to see when the internet connection is not working. So I checked all my network connections my wireless connection but in vain. Tried rebooting which also did not help. After which I tried to read the error closely which said "Firefox is working in offline mode".
Then immediately I went to Edit -> Preferences and searched through the option to enable the online mode, but couldn't find one. At last after going through all the menu Items found the menu item to enable online mode here File -> Work Offline

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Disable Offline Mode using a Firefox extension addon
Disable Offline Mode Firefox extension addon
Easiest Fix to Avoid Firefox Offline Mode
I experienced the same issue but after googling, I found that setting Firefox's property "toolkit.networkmanager.disable" to "true" solves it. You need to type about:config at the address bar and then set "toolkit.networkmanager.disable" to true. I even blogged it.
Thanks - was looking for
Thanks - was looking for that.