לעברית לחצו כאן
Update: as of 3 May 2019, a new certificate installation software was released, the new software automatically installs the certificate also in Firefox browser.
Install the certificate for browsing:
The Firefox browser has its own certificate / certificate list, therefore, it is necessary to install NetFree's certificate on it.
Download certificate from this link http://netfree.link/netfree-ca.crt, (you must be connected to NetFree).
Open settings, search for credentials, click "View credentials ..."
In the "Authorities" area, click "Import" and select the certificate file you downloaded
Sometimes you need to restart your browser.