I have the same bug I believe and have done for a couple of versions. It happens when Chromium gives a prompt upon first running it saying that it is not the default browser. I click 'make default browser' and the prompt goes away - but it does not make chromium the default browser and the prompt will return later asking the same thing. I have iceweasel installed as the current default browser. I'm running Testing like the original author. DE are cinnamon and Gnome
