Hi, I don't have fibro but I've studied a lot about nutrition and how it can be used to optimize health, no matter what your health challenge. I'd like to recommend a book I've been reading by Dr. Paul Yanick called Neuro Nutrition.
He's had success with treating nerve disorders, tinnitis and fibro using nutrition. The book is only digital but if you don't have a kindle, you can read it on your computer.
My own thoughts on a fibro friendly diet would be pure natural foods, lots of fruits and veggies, take the chemicals, sugar, processed foods and toxins out of your diet and your life as much as possible. Even eat organic if you can.