<span title="NsAppShell:EventWindow:firefox.exe-Application">NsAppShell:EventWindow:fi...</span> Error

Question

it always happens when i close my firefox web browser.plz help to solve this

Answer 1

You probably have a bad plug-in / add-on. Disable them one by one until you don&#039;t get the error; or, disable them all, then re-enable them one by one until you get the error, and that&#039;s your culprit.

If you have no add-ons or that doesn&#039;t work, uninstall Firefox, then reinstall it.