Mozilla Thunderbird

Mozilla Thunderbird crashes can be caused by outdated software. Keep your developer products up to date by installing the latest updates.

Restarting your computer is often an effective solution to resolve various common problems. Therefore, it is recommended to do so before making any changes to the software configuration.

Changing the default program in Windows

1. Right-click on your file, then choose the "Open with" option and select "Choose another application" from the available options;
2. From the list of applications in the pop-up window, find and select Mozilla Thunderbird as your desired application;
3. Check the "Always use this app" checkbox, and then click "OK" to set your chosen app as the default for opening files.

Change Default Program on Mac

1. Initiate a right click or use Control + left click on the desired file to open a menu where you can select various actions;
2. Select "Open in application" and click "Other";
3. Towards the bottom of the window, find the "Enable" menu, which is already set to the default option, "Recommended Programs";
4. Within this menu select "All Programs" and navigate to Mozilla Thunderbird. Check the box next to "Always open in app" to make sure it’s the default option.