
Sometimes the current version of the website and what is in your browser cache are different, and this may block the connection, which may cause a ‘this site can’t be reached the connection was reset’ error message. This includes what websites you have visited, passwords, cookies, and your general browsing history on that website. *Do NOT click the Reset button on the Safe Mode start windowYour browser cache stores the data from all the websites you have visited. *Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance Start Firefox in ] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem. *Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies" *Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" Read this answer in context 👍 38 All Replies (1) Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

