Puntuado con 5 de 5 estrellas

por electro_rockets el Feb. 4, 2016 · enlace permanente

enter the advanced firefox settings:

1. in the address-bar type: "about:config"
2. press enter
3. click on: i'll be careful, i promise
4. locate the line: "xpinstall.signatures.required"
5. change its value from true to false

close the tab & rock on