Improve security for users everywhere

  • Technical data for updates: Desktop versions of Waterfox periodically check for browser updates by connecting to Waterfox servers. Your Waterfox version, language, and device operating system are used to apply the correct updates. Mobile versions of Waterfox may connect to another service if you used one to download and install Waterfox.

  • Technical data for add-ons blocklist: Waterfox for Desktop and Android periodically connect to Mozilla to protect you and others from malicious add-ons. Your Waterfox version and language, device operating system, and list of installed add-ons are needed to apply and update the add-ons blocklist.

  • Webpage data to Google’s SafeBrowsing service:

    Learn more or read Google’s Privacy Policy. Opting out prevents Waterfox from warning you of potentially illegitimate or malicious websites.

  • Webpage and technical data to Certificate Authorities: When you visit a secure website (usually identified with a URL starting with "HTTPS"), Waterfox validates the website's certificate. This may involve Waterfox sending certain information about the website to the Certificate Authority identified by that website.

    Opting out increases the risk of your private information being intercepted. Learn more.

Website notifications

  • Connection data: If you allow a website to send you notifications, Waterfox connects with Mozilla and uses your IP address to relay the message. Mozilla cannot access the content of messages.

  • Interaction data: Careful! Mozilla receive aggregate data such as the number of Waterfox subscriptions and unsubscriptions to website notifications, number of messages sent, timestamps, and senders (which may include specific website providers).

Read the full documentation or learn more, including how to revoke website notifications.


You can install Add-ons from (“AMO”) or from the Waterfox Add-ons Manager, which is accessible from the Waterfox menu button in the toolbar.

  • Search queries: Search queries in the Add-on Manager are sent to Mozilla to provide you with suggested Add-ons.

  • Interaction data: We receive aggregate data about visits to the AMO website and the Add-ons Manager in Waterfox, as well as interactions with content on those pages. Read about data practices on Mozilla websites.

  • Technical data for updates: Waterfox periodically connects with Mozilla to install updates to Add-ons. Your installed Add-ons, Waterfox version, language, and device operating system are used to apply the correct updates.


Waterfox pre-release versions of Waterfox are under active development and may contain different privacy characteristics.