User Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150525141253 Steps to reproduce: This blinking of firefox browser started all of a sudden whenever another window is opened.
Can you provide a screencast and try if you can reproduce the problem if you use a new profile ( https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles ) ? If so, please provide the "graphics" section of the Help > Troubleshooting Information page.
What platform? Graphics section of about:support?
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