Avast Online Security & Privacy by AVAST Software

Secure your Mozilla Firefox browser against real-time online threats, trackers, and scams.

Browse with confidence using Avast Online Security & Privacy. 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.

• Identify and block phishing sites trying to steal your data.
• Quickly check the risk rating of any website just by hovering over the link.
• Block invasive tracking cookies that collect data on your browsing activities.
• Block online advertising and remove your details from advertisers’ databases.
• Optimize your privacy preferences and settings across your favorite online platforms.
• Automatically ask sites to stop tracking you and selling your data. Learn more at https://globalprivacycontrol.org.

The data we collect includes:
• URL - to check if the website is safe or not
• Usage data - to measure the user’s behavior on the interface and understand how the user interacts with the extension
• Internal extension identifier (GUID) - to distinguish unique malware hits, to measure product telemetry and calculate aggregated statistics
• Information about device (browser type, operating system version) - to obtain usage aggregated statistics
• Country - to detect country specific malware campaigns, and to measure product telemetry and calculate aggregated statistics


By installing this extension in your browser, you acknowledge that you have read our privacy policy (https://www.avast.com/en-us/privacy-policy) and the end user license agreement (https://www.avast.com/en-us/eula), which set out the conditions for downloading and using the selected product, and that you agree with them.