Make Firefox your default browser | Firefox Help - Mozilla Support
Mar 18, 2026 · How to make Web links open in Firefox automatically by setting it as the default browser on your computer.
Setting Firefox as the default browser does not work - What to do
Jun 30, 2023 · Learn how to make sure Firefox is the default browser if setting that option didn't work, or it got changed by another program.
Add or remove a search engine in Firefox | Firefox Help
Sep 28, 2025 · 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 …
How to set the home page | Firefox Help - Mozilla Support
The Firefox homepage is the first page you see when you open Firefox, click the Home button or start a new window. By default, Firefox uses the New Tab page as your home page. This article explains …
Client Challenge - Mozilla Support
Please check your connection, disable any ad blockers, or try using a different browser.
Certificate contains the same serial number as another certificate
Sep 2, 2025 · Why Firefox may show you a Secure Connection Failed error when you try to access the configuration page for your router and what to do.
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.
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 …
Firefox Help - Mozilla Support
Learn how Firefox will continue supporting Windows 10 after Microsoft ends its updates, and discover the steps Mozilla recommends to keep your browsing experience secure.
Change Firefox options, preferences and settings
Learn how to access and adjust Firefox settings, including privacy, startup behavior, downloads and more.