OK, it's time to get equal and not fu*ked by color profiles. If you want your photos look the same on the web as they look in PhotoShop, do the following:
in the adress bar. The Firefox will give you a warning regarding that you can mess up the whole browser if not being careful. So, do it careful and only the thing I say next.
When you're in, you'll see much of the settings written up in a similar way like Windows Registry. Just find gfx.color_management.enabled.
It will most likely be on "false".
Double click it and make it TRUE
After that, restart Firefox (just close it and get it running again).
That's it, you're colour-ready!
Now your colors are waaaay better and you will see the photos(colors) as they really are.
I had the same problem when saving from PS and uploading photos on web as they always got oversaturated in that process (saving->uploading->viewing it on web). Now I feel a lot happier.
My first serious photos with Sigma 10-20
Thx for watching and all the support.