Hello neiderer, Would you try this please : Clear the Firefox cache - see : https://support.mozilla.org/en-US/kb/how-clear-firefox-cache "Remove the cookies" from websites that cause problems - see : https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored (scroll down to : "Delete cookies for a single site") 'Hope that works ...... -------------------------------------------------------------------------------------------- Your system details show that you are using an old Firefox version, probably because you visit sites that require the Java plugin ? If you absolutely need Java, then maybe you could use this ESR version : https://ftp.mozilla.org/pub/firefox/releases/52.9.0esr/ -------------------------------------------------------------------------------------------- Your system details also show that you are running a very, very old Flash version, which can cause problems. To uninstall, please see : https://www.cyberciti.biz/tips/debian-ubuntu-mint-linux-upgrade-flash-player.html To download the latest version : https://get.adobe.com/flashplayer/otherversions/