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  1. mailto does not work: Windows says You'll need a new app

    Jun 2, 2023 · Can't set default for email - it says there are no installed apps for this type of file or protocol Can't set the default protocol - mailto is not on the list. How can I set Thunderbird as …

  2. Cannot set Firefox as default browser Windows 10

    Feb 11, 2020 · If you click "choose default apps by protocol" do you see Firefox as an option under the http and https protocols? The option "set defaults by app" on the Default apps …

  3. Can't make Firefox my default browser as it's NOT listed in Choose …

    Nov 16, 2017 · There's just Microsoft Edge listed, along with Internet Explorer, and an option to choose an app from the shop. Microsoft Edge is also presumptuously shown as the default …

  4. Where can i change the default programs opener in firefox

    Jun 2, 2013 · Usually, the torrent client must be associated with the magnet protocol either in its settings window, or in the Windows Control Panel, Default Programs section. If no program is …

  5. Thunderbird - twitter no app associated - Mozilla Support

    Aug 28, 2020 · The Twitter links that I'm sent are all https:// 4. If network.protocol-handler.warn-external.https is set to false, right click on it, and select "Toggle", so that the value shows …

  6. How can I get MAILTO: links to open Thunderbird?

    Jun 22, 2018 · the settings of default programs to use MAILTO protocol. I've seen instances where it could be the registry setting. Check Mozilla Firefox browser settings: click on 'Open …

  7. Manage file types and download actions in Firefox | Firefox Help

    Jun 6, 2025 · This is only shown for content types that include the Open in Firefox option (PDF, AVIF, XML, SVG, and WebP Image files) and is available when your system has another …

  8. Hyperlinks in messages do not work | Thunderbird Help

    Apr 14, 2025 · To check if this might be the cause, open the Troubleshooting Information in the Help menu and under the Important Modified Preferences heading, look for a preference …

  9. How to change the default browser for URL:MK and URL:RES …

    Sep 11, 2017 · URL:MK Protocol URL:RES Protocol I have tried to disabling the IE and set this protocol manually but it didn't work. I can't reinstall the OS. I also have tried through the …

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

    Aug 29, 2025 · Set Firefox as the default handler for mail links on Windows 11 Open the Windows Start menu and select Settings. From your system Settings menu, click Apps. Select Default …