Under tools, options the box for popups keeps becoming unchecked
I select tools, options and place a check mark in the popups section and select OK. This works for a short while. Then I start getting popups. I check back under tools, options and now there is no check mark in the popups option. Place check mark again and select OK. Then again the check mark turns off.
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What security or anti-virus applications do you have installed?
http://kb.mozillazine.org/Popups_not_blocked#Other_software_disables_the_popup_blocker
You may have an external application that is turning off that Firefox preference after a computer restart. If that happens only after Firefox is re-started, there might be a hidden preference added to Firefox via a user.js file.
http://kb.mozillazine.org/User.js_file
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
See also: