Estás a falar de addons ?Se tiver 2 ou mais já não funciona.
An even more extreme example is this page, which contains over 400 iframes. Without ABP, Firefox uses about 370 MiB. With ABP, that number jumps to 1960 MiB. Unsurprisingly, the page also loads more slowly with ABP enabled.
So, it’s clear that ABP greatly increases Firefox’s memory usage.
Testem com o uBlock Origin:
https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/
Estou a testar este ramo do uBlock original e está a dar-me menos problemas.
Mas continuo a gostar mais do AdBlock Plus.
Nota:
Têm que desinstalar o uBlock.