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  1. Mark messages as Read only after I read them - Mozilla Support

    Sep 11, 2025 · I can't find a setting that will allow marking messages as read only after I read them. By that I mean only after I click on the message to open it in its own tab. I view the new messages in a …

  2. Bookmarks in Firefox | Firefox Help - Mozilla Support

    Oct 20, 2025 · Bookmarks (called Favorites in Microsoft Edge) are links you save to web pages that make it easy to get back to your favorite places. This article covers the basics of creating and …

  3. Install Thunderbird on Windows | Thunderbird Help

    Apr 7, 2025 · This article describes how to install Thunderbird on Windows. If you are upgrading from a previous version of Thunderbird, see Update Thunderbird to the latest version.

  4. How to install Firefox on Windows | Firefox Help - Mozilla Support

    Oct 7, 2025 · This article explains how to install Firefox on Windows, either with a simple online installer from Mozilla or from the Microsoft Store. If you need a full, offline installer with custom options, see …

  5. Troubleshoot and diagnose Firefox problems - Mozilla Support

    Sep 19, 2025 · This article includes a series of steps you can follow, that will help you fix most problems with Firefox.

  6. Choose your preferred PDF viewer in Firefox | Firefox Help

    Feb 27, 2025 · When Firefox is set as the default PDF viewer, it automatically opens PDF files in the built-in viewer. However, you can choose to use another application to view your downloaded PDF …

  7. Set Firefox as your mail-to default on Windows | Firefox Help

    Aug 29, 2025 · Learn how to set Firefox as your MAILTO default on Windows and configure it to handle mail links seamlessly.

  8. Make Firefox your default browser on Windows | Firefox Help

    Oct 7, 2025 · Whether you're using Windows 10 or the latest Windows 11, this guide will help you set Firefox as your default browser with minimal fuss. Setting Firefox as your default browser on …

  9. Client Challenge - Mozilla Support

    Please check your connection, disable any ad blockers, or try using a different browser.

  10. Cookies - Information that websites store on your computer

    Sep 13, 2025 · What is a cookie? A cookie is information stored on your computer by a website you visit. In some browsers, each cookie is a small file but in Firefox, all cookies are stored in a single file, …