Hello SG2009, check if your security software (firewall, antivirus) blocks firefox or plugin-container process without to inform you. Try to remove all rules for firefox from permissions list in your security software (firewall) and then, let your firewall to ask again for firefox permissions.

thank you

Unfortunately, this problem is occurring on a work computer and I don't have full control over the firewalls and/or security software. To

That said, I don't understand why it would be a firewall and/or security software issue if simply closing/reopening Firefox resolves the issue.

SG2009 said

That said, I don't understand why it would be a firewall and/or security software issue if simply closing/reopening Firefox resolves the issue.

Yes, indeed you are correct, probably it is not a firewall issue, maybe the vpn software is the problem (the connection to servers) and after firefox restart seems fixed, do you have the same behavior in other browsers also ?

Do you have the option to select a different server in your vpn software ?

thank you

What security security software is installed on the computer?

Are you using a proxy at your work location that may not work properly when you are at home?

You can check the connection settings.

• Tools > Options > Advanced > Network : Connection > Settings
• https://support.mozilla.org/kb/Options+window+-+Advanced+panel

See "Firefox connection settings":

• https://support.mozilla.org/kb/Firefox+cannot+load+websites+but+other+programs+can

• FoxyProxy Standard: https://addons.mozilla.org/firefox/addon/foxyproxy-standard/