User Agent: Mozilla/5.0 (Windows NT 5.1; rv:7.0a1) Gecko/20110704 Firefox/7.0a1 Build ID: 20110704030740 Steps to reproduce: Go to http://ts3.travian.com.br/login.php Move the mouse to the text "Home", but don't click on it. A black tooltip box with some text will appear. Hit F5, don't move the mouse. Actual results: The tooltip is drawn on top left of the page. Expected results: The tooltip should be drawn where the mouse is. The problem happens on Firefox 5 and on Nightly. It works correctly on Google Chrome 12.

Able to confirm on Mozilla/5.0 (Windows NT 5.1; rv:9.0a1) Gecko/20110905 Firefox/9.0a1 ID:20110905030839 This does not occur in Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.21) Gecko/20110830 Firefox/3.6.21 ID:20110830092825 Guilherme -> Would you be interested in tracking down a regression window? http://harthur.github.com/mozregression/ Quick search for dupes didn't find any...

pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=01fa971e62ee&tochange=0886ad6e6aaa Triggered by Bug 130078 - integrate iframe into chrome view hierarchy (link view managers / trees between chrome and content)

A standalone testcase would be wonderful here (something I can edit), even if it isn't reduced or even small at all.

I think that the similar behavior can reproduce in this testcase.

Thank you, that is wonderful.

20160502172042 Mozilla/5.0 (Windows NT 5.1; rv:46.0) Gecko/20100101 Firefox/46.0 20160519030232 Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0 I have tested your issue on latest FF release 46.0.1, latest Nightly build 20160519030232 and managed to reproduce it. The page from STR is not available anymore. I tested with testcase attached in comment5(https://bugzilla.mozilla.org/attachment.cgi?id=592621) and the issue is reproducible.