User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1a3) Gecko/20060526 BonEcho/2.0a3 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1a3) Gecko/20060526 BonEcho/2.0a3 Even when the option "new tabs in the most recent window" is set to true, the link in the bottom right of the Add-ons dialog "Get more Extensions" opens a new window when clicked. Reproducible: Always Steps to Reproduce: 1. Go to Tools->Options->Tabs. 2. Ensure "new tabs in the most recent window" is checked. 3. Make sure you have only one firefox window opened. 3. Go to Tools->Add-ons. 4. Click on the "Get more Extensions" links in bottom right corner of the addon dialog. Actual Results: Spawns the a new firefox window for loading the addon site. Expected Results: Should obey the option setting and should have opened the addon site in a new tab in the recent window. I think this worked fine in FF 1.0. Though I cannot confirm it now.

Fixed in Fx2 *** This bug has been marked as a duplicate of 262575 ***

To be more accurate, this will probably be fixed by 2.0b2.