User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b2) Gecko/20081201 Firefox/3.1b2 Ubiquity/0.1.4 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b2) Gecko/20081201 Firefox/3.1b2 Ubiquity/0.1.4 Similar to bug 465186 (Mac OS X), but on Windows XP. I have two heads, I run Firefox primarily on #1. Sometimes I want to keep working while watching a video on #2. If I drag the tab out into #2, then it opens a new full-screen window on #1. Reproducible: Always Steps to Reproduce: 1. Start Firefox (full-screen) on first head 2. Drag tab to second head Actual Results: Window opens full-screen on first head Expected Results: Window opens full-screen on second head

We could also mark bug 465186 as applying to all platforms (and there is nothing special about the second monitor WRT the position of the window).