Some images - especially in Facebook appears green-ish and purple-ish when I view using Firefox but when I open the same page using Chromium the image colour is normal.
Solved - the issue was the same as this one on the Firefox Forums.
That can be caused by a problem with the color profile for your display monitor or color profiles embedded in images.
You can disable color management to test that.
You can set the pref
about:configpage to disable Color Management.
You need to close and restart Firefox to make the change effective.