Download and unzip the file and check the hint:
Hint: A potential insider threat has been reported, and we need to find out what they accessed. Can you help?
Files: 113 files inside a Mozilla folder
If we look in the Mozilla/Firefox/Profiles/2542z9mo.default-release folder (it's the first profile), we find a logins.json file with an encrypted username and password. Some simple Google-Fu brings us to https://github.com/unode/firefox_decrypt. Clone into that and run it against that first 2542z9mo.default-release profile.
└─$ python3 firefox_decrypt.py -f json ../2542z9mo.default-release
2022-01-29 12:24:16,199 - WARNING - profile.ini not found in ../2542z9mo.default-release
2022-01-29 12:24:16,199 - WARNING - Continuing and assuming '../2542z9mo.default-release' is a profile location
Well that was easy.