It just shows ver 52 here. If that is correct then should be on the Extended Release Version 52.5.3 ESR : to receive security updates. *https://www.mozilla.org/en-US/firefox/organizations/all/ for : *https://www.theinquirer.net/inquirer/news/3023893/opera-mozilla-vivaldi-and-more-rush-to-patch-spectre-and-meltdown-security-holes or ver 57.0.4 for same fix. I do not see anything for that after 2011. Would also be your Drivers if running 3.0 would think is fine...though can not say for sure. This should be looked at at the card makers end for fixing security issues as it is their drivers and not Mozilla's. Please let us know if this solved your issue or if need further assistance.