I mean sure, or I can do a decent job myself ; are you asking to make a point, or a genuine request?

I would like to know more about what "Color can change culture. The latest colorways celebrates voices making the world a better place." means.

What the words mean is that you can feel good about yourself and believe that you are "standing with" the oppressed flavor of the month, "resisting" whatever is to be resisted today, and generally be an "ally" by using the products and services of corporations that say these words.

It's like landing at Normandy, but from the comfort of your living room.

How is that related to a web browser?

It's alluding to https://en.wikipedia.org/wiki/Color_psychology

For example, how https://en.wikipedia.org/wiki/Baker-Miller_pink is used in prisons to foster a less violent culture among the prisoners.

"voices making the world a better place" is referring to Martin Luther King, Jr.

I think it would have been better if they simply said "Firefox is now pink to make you a nicer person" so that more people could understand.

So they're conducting psy-ops on their users to manipulate them into behaving in a way that Mozilla decided is best? I'm a fan of Firefox, but that's bizarre.