When I open fiefox many times the following message appears.
" Το σεναριο ενεργειων δεν ανταποκρινεται..........." and requests either to continue or cancell it.
Does the error message include which chrome:// file is not responding?
This issue can be caused by an extension that isn't working properly.
Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).