hello, please try to refresh firefox and see if this can address the issue...

It appears that you are using Firefox 31.0, an ancient version from July 2014. You can download the latest Firefox 47.0 version from here: https://www.mozilla.org/en-US/firefox/all/

Refreshing Firtefox has not worked. By the way: I am using Front Motion Firefox for which version 31 is the current one!

jgpost said

Refreshing Firtefox has not worked. By the way: I am using Front Motion Firefox for which version 31 is the current one!

Firefox 31.0 is not the current as it is almost two years old now and not patched with security fixes that have been put in since. https://www.mozilla.org/firefox/releases/

Actually the FrontMotion package of Firefox 31.0 you have is not the current one from FrontMotion as there have been several updates since then.

http://www.frontmotion.com/firefox/download/ http://www.frontmotion.com/fmfirefoxce/download/

You can check for problems with preferences.

Delete possible user.js and numbered prefs-##.js files and rename/remove the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in current Firefox releases.

• http://kb.mozillazine.org/Preferences_not_saved
• http://kb.mozillazine.org/Resetting_preferences

There is software like Advanced SystemCare with its Surfing Protection feature that can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10