It's not working anymore, the jackasses at Avast dropped support for the extension only for Firefox but not for Chromium browsers. Better look for a Firefox friendly alternative instead.

This page shows upon installing the extension:

English: support.avast.com/en-us/article/aosp-firefox-discontinuation-faq/#pc
Spanish: support.avast.com/es-mx/article/aosp-firefox-discontinuation-faq/#pc

Ne fonctionne plus et arrêter par Avast eux-même.

Suddenly popped up to install.,No privacy at all.,So I didn't notice that I installed this *** thing.,Do you want to lock my permissions and then don't let me use the computer? Rogue Bundle (BRUH)

Just because I can't use it anymore...

Ending support because Chrome is more 'popular' is so dumb. Chrome is more 'popular' because it's literally forced on everyone and preinstalled on everything. I use Firefox because Chrome harvests personal data to sell to advertisers and won't let me use adblock. so annoying that y'all ended support.

As a paying customer for AVAST its moronic that you are removing this because its not as popular as google chrome or edge that are FORCED upon people. Its making me 2nd guess my choice to use you as a antivirus/malware provider

avast ya no sirve en firefox

It used to be 5 star but ever since this---
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Important:We have ended support of our Avast Online Security & Privacy browser extension for Mozilla Firefox.
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It is now worth 1 star, why would you end support for Avast via firefox? Surely there was a way around this?

The once king of anti-virus has gone, Avast used to be good in the 1990's, it's moves like this that destroy it's reputation and quality.

Нету толка от этого приложения!