Automated Update Service. Firefox’s automatic update feature periodically checks to see if an updated version of Firefox and installed add-ons are available from Mozilla.
Firefox
This feature sends Non-Personal Information to Mozilla, including the version of Firefox you are using, build ID and target, update channel, your operating system, and your language preference. This feature also sends Potentially Personal Information to Mozilla in the form of a cookie named “aus” that contains a unique numeric value to distinguish individual Firefox installs. Mozilla uses this information to provide you with updated versions of Firefox and to understand the usage patterns of Firefox users. We use this information to improve our products and services and to support decision making regarding feature and capacity planning.
Add-Ons
The add-ons update version check sends Non-Personal Information to Mozilla, including the version of Firefox you are using, version of the add-ons you have installed, build ID and target, update channel, your operating system, and your language preference with each check of an add-on that uses
https://addons.mozilla.org/en-US/firefox/ as its update host. If any of your add-ons use a third party update URL, Firefox will check that URL for updates to those add-ons.
We do not collect or track any Personal Information or any information about the Web sites you visit, and we do not release the raw information we obtain from these features to the public. We may release reports containing Aggregate Data so that our global community can make better product and design decisions. To prevent Mozilla from obtaining this information, you can turn this feature off in Firefox’s preferences. An
article in our Firefox Knowledge Base gives you information about changing your preferences.