Whenever I start Thunderbird (17.0), something starts my 2 installed browsers /FF and Chrome) automatically and opens as many tabs as there are gif or jpeg or ico elements in the first email opened. Sometimes having reached the tab limit (?), it opens a second or third instance of the browser and chokes my computer with 100% CPU. I have seen as many as 83 open tabs in a >>single<< browser instance. Clearing the browser history doesnt help at all. I changed to a Mint dual boot installation but the "infection" followed me there to both browsers, probably transferred via XMarks.
Whenever I open an email with no graphics, only one tab is opened , seemingly always pointing to favicon.ico from Google.
ClamTK Antivirus show a clean machine.
Anyone with any suggestions??
Environment Ubuntu 12.10 / Unity and Mint 13 /Maya