How to install Upwork Time Tracker on Fedora 23

I am just curious, why Upwork time tracker cannot run on Fedora 23. After successfully installed, and I start Upwork time tracker, it says “THERE WAS A PROBLEM LOADING UPWORK”.

And when I start on linux terminal to get full error log i get this error log “Unknown SSL error -12218 mapped to net::ERR_SSL_PROTOCOL_ERROR”. I am searching on Google and found few solution about that error, keep trying but get nothing.

Finally, i found one question with solution on Mozilla Firefox Suppport page (here). I just need to downgrade the mozilla nss library that required by upwork, i guess upwork curently not support using latest mozilla nss library or something wrong with nss library. So i fix the problem with this step:

Downgrade NSS Library (also mozilla firefox, since it’s required by latest mozilla firefox)

Start terminal, and run this command :

press y to confirm, and wait until finish. Start upwork again, and see the result.

If you don’t want downgrade nss and firefox, follow this post update.