That had started at Firefox 60.8 and running an update only got me to 60.9. I had a similar issue with SUSE 12 SP3 and was able to get it to work. I've copied it to the /opt folder and copied it to /usr/local/bin and created a mozilla folder, done some sort of symbolic link and none of that works. I've tried downloading the newest copy from but that doesn't work. It seems the default Firefox installed with CentOS 6.9 is 52.2 I think if my memory serves me correctly. There may be some quotes in there, but the idea is after a reboot and I type in 'env' in terminal I see the listing for all the proxy settings. To set the proxy settings we do this:Įxport no_proxy=localhost, 127.0.0.1, etcĮxport NO_PROXY=localhost, 127.0.0.1, etcĮnv_keep +=http_proxy https_proxy HTTP_PROXY HTTPS_PROXY no_proxy NO_PROXY

We can configure the system settings, but unfortunately it appears that Firefox does not pick up on those settings. We have a testing environment here that uses a proxy and one of the Linux images we use is CentOS 6.9.

Firefox current version