I used this on Chrome for a long time, now on firefox. Never tried import, however it works great. Very nice user interface.

Give it a try, best I've found.

pretty good to block hole site

Please add signing

gutes add-on, hilfreich

Career saving extension

easy to use and it works.

Excelente extensión, pido que puedan cambiar las imágenes que salen y los nombres.
Del resto, excelente.

This is one of the best tools for blocking those annoying ransom ware pages.