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Make Firefox your default browser | Firefox Help - Mozilla Support
How to make Web links open in Firefox automatically by setting it as the default browser on your computer.
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Install Thunderbird on Windows | Thunderbird Help - Mozilla Support
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.
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Bookmarks in Firefox | Firefox Help - Mozilla Support
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 managing Firefox bookmarks.
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Mark messages as Read only after I read them - Mozilla Support
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 split screen. The curren...
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Troubleshoot and diagnose Firefox problems - Mozilla Support
This article includes a series of steps you can follow, that will help you fix most problems with Firefox.
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Appearance Panel - Layout, Message List, Card View, Table View, Sorting ...
An overview of the Appearance panel in the Thunderbird app settings including: layout, card and table view, sorting and threading settings
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Set Firefox as your mail-to default on Windows | Firefox Help
Learn how to set Firefox as your MAILTO default on Windows and configure it to handle mail links seamlessly.
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Manage Firefox with Microsoft Endpoint Manager (Intune)
Note: Microsoft has a new feature in preview that makes it much easier to import ADMX templates into Intune. We strongly recommend using it if you can. For more information, see Import custom ADMX and ADML administrat...
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Keyboard shortcuts - perform common Thunderbird tasks quickly
Keyboard shortcuts are quick key combinations that let you perform certain tasks in Thunderbird faster. For example, if you want to archive a message, you can simply strike the "A" key rather than using the mouse to c...
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Add or remove a search engine in Firefox | Firefox Help
Firefox comes with a set of default search engines, and you can add more from websites, add-ons, or partner pages. Some users want to add fully custom search engines, but Firefox only supports this in limited cases wi...