User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:220.127.116.11) Gecko/20100701 Firefox/3.5.11 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:18.104.22.168) Gecko/20100701 Firefox/3.5.11 After browsing for a few hours, Firefox starts blocking all new windows. It shows the message "Firefox prevented this site from opening a pop-up window" even when "Block pop-up windows" in Options>Content is unchecked i.e. turned off. Any button on any web-page/website that leads to a link that is supposed to open in a new tab/window gets blocked. Right clicking the original link and selecting "Open link in a new tab/window" bypasses the pop-up block message. A Firefox restart also fixes this problem for a few hours but I loose all open tabs/windows on restarting. It happens again in few hours. Reproducible: Always Steps to Reproduce: 1. Browse FF with a large number of tabs open 2. Clicking many links which open in more new tabs Actual Results: Suddenly FF pop-up blocker starts blocking most of the links clicked on any website thinking it as a pop-up and shows the message "Firefox prevented this site from opening a pop-up window" even when "Block pop-up windows" in Options>Content is unchecked i.e. turned off. Please view this image to see the problem more clearly: http://i33.tinypic.com/2r3wp5y.jpg
Created attachment 489491 [details] Screenshot of problem This also happens when the pop-up blocker is enabled, but a site is on the whitelist.
Still happens in Firefox 4.0.
do you still reproduce this with a current version?
This still happens with 16.0.2. More data: If I close one or more tabs, the pop-up blocker will start working again for a while.
A couple of usual questions: is this reproducible in Safe Mode (Help - Restart with Add-Ons Disabled)? If yes, can you check latest nightly build too? Link - http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-central/firefox-19.0a1.en-US.win32.zip. Backup your profile folder before second test just in case
Resolved per whiteboard