Full policy: https://www.citationcreation.com/privacy#extension

The Citation Creation browser extension reads a page only when you press Cite, or choose to cite it from the right-click menu. At that moment it sends us the page's address, its title, its tags, and the heading, byline and date the article shows. The tags are the details a page gives about itself for search engines and reference managers, such as its author, its publication date and its DOI. The text of the article is not sent. A summary or abstract the page gives in its tags may be among them.

We use these details to build the citation, and look the source up as described under "Looking up and checking sources" in the full policy. When you cite a link, or a page whose tags say too little, our server reads the page itself, as it does for an address you type on the site. What you type into the extension's citation form is sent to us so we can show the reference in your style, and again when you save it. A saved citation includes the page's address and title, with the day you cited it, and is kept in your project like any other.

When you open the extension, it asks us for your guest project, or, once you have signed in, for your projects and this month's usage. When the extension is installed, it opens a welcome page on our site. If this browser already has a guest project on the site, the extension takes that project as its own, so your sources stay in one place.

The extension does not read or record the pages you visit but do not cite, or anything you type on other sites. It keeps your citation style, a form you have not finished, your sign-in and the key to your guest project in your browser, and sends each only to Citation Creation.

A guest project made in the extension is reached by a key the extension keeps. The project is deleted 30 days after it was last used, and removing the extension loses the key, and with it the way back to the project. The sign-in lasts a year from the last time the extension is used. You can end it from the extension, or under Settings, Security. While you are signed in, the extension keeps your name, your email address and your plan to show who is signed in, and the project you last chose to save to. It also keeps, for a short time, a check that the sign-in still works.

The extension follows Mozilla's Add-on Policies for Firefox Add-ons.