Avast Online Security & Privacy

Secure your Mozilla Firefox browser against real-time online threats, trackers, and scams. We’ll check every site you visit, from Facebook to your bank, so nothing puts you or your data at risk. Join a growing community of 400 million Avast users.

Avast Online Security & Privacy is available to install from Firefox Browser Add-ons and for download from this page. It has 21,389 active users The latest version is 22.12.189, and it was published 6 months ago.

Install from Firefox Browser Add-ons
View source code
Total download count: 2 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of Avast Online Security & Privacy here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions
 7 versions available for download.

Install XPI file

  1. Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  2. In Firefox browser, go to about:addons to open Add-ons Manager
  3. Click on , then select Install Add-on From File
  4. Select the Avast Online Security & Privacy ZIP file from step 1. Avast Online Security & Privacy is now installed on your browser.