How do I Open MBOX File in Mozilla Thunderbird

Try to open the windows in safe mode. Follow the given steps to open windows in safe mode:
1. Go to Settings> choose Change PC Settings.
2. select Update and Recovery> choose Recovery.
3. Under Advanced Start-up> select Restart now
4. Once the PC is restarted> choose Troubleshoot> Advanced option>restart
5.Choose the necessary start-up option and sign in to system.

Hello,

Try to start Thunderbird in safe mode by holding down the shift key while you are trying to open the Thunderbird Mail client.
Hope this will help.

You can try importing MBOX files to any other email client

Yes you can do that using MBOX viewer available on the internet.

Yes you can view all the emails along with the attachments. I would suggest you “ SysTools MBOX Viewer ”