Other suggestions that come into my mind:
Install Noscript on your browser.
Even better sandbox your browser while surfing on unknown sites
https://www.sandboxie.com/ Or even better consider to install a virtual machine to split your browsing activity into safe and unsafe (you surf to bitcointalk, bank accounts, exchanges, etc only on the safe side)
Even better use
https://www.qubes-os.org/ as OS.
Nothing is protect meldtown and spectre attack,even virtual machine.