Q:

Some images appear discoloured in Firefox

Some images appear green-ish and purple-ish when I view them using Firefox, but when I open the same page using Chromium the image colour is normal.
What could be the problem and how can I fix it?

A:

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 gfx.color_management.mode to 0 on the about:config page to disable Color Management.
You need to close and restart Firefox to make the change effective.
See:

http://kb.mozillazine.org/gfx.color_management.mode

