I found this distribution excellent. Yet I found a little problem. Sitting next to me is my wife's computer, running Windows 10, and she loves to play Facebook games. I discovered that some of those games wouldn't work with FireFox in SolydXK.
Here's how I fixed it.
1) Open a terminal and login as root.
Enter your password.
2) Change to /usr/lib
FireFox is looking for a file called "libpepflashplayer.so" - it's in there, just not where Firefox wants to find it. So find it with this command:
Once it's found, make sure you keep the terminal open. You're going to need to copy that file location in a minute.
3) Create a new directory.
4) Copy libpepflashplayer.so into your newly created directory. I can't put this in code for you. You're going to have to look where it is from above. Then in your terminal you're going to do this: cp ./directory-where-you-found-it/libpepflashplayer.so ./PepperFlash
That's it. Worked for me. Now Firefox will work with those useless time wasting Facebook games my wife likes to play! Close your terminal and hopefully it will work for you.