ad blocker
US /ˈæd ˌblɑːk.ər/
UK /ˈæd ˌblɑːk.ər/

1.
ad blocker, blocco annunci
a piece of software that prevents advertisements from being displayed on a web page or in an application
:
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I installed an ad blocker to stop annoying pop-ups.
Ho installato un ad blocker per bloccare i fastidiosi pop-up.
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Many websites detect if you are using an ad blocker.
Molti siti web rilevano se stai usando un ad blocker.