If F-Secure SAFE is uninstalled; maybe only F-Secure Browser Extension is 'stucked' under system.
At least, there are steps to ensure that extension is enabled - but likely that possible to doublecheck with such steps whether extension is removed or disabled (and if not -> to disable it or to remove it).
Additionally, possible to try F-Secure Uninstallation Tool for Mac:
(it is possible that with your device ftp is inaccessible).
If trouble is anyway still there -> possible to re-ask under Community or to contact their official F-Secure Support Channels (chat as example) for certified advice and investigation: