I found this very simple yet very clear list of principles that can be kept in mind while developing for the web.

https://ethicalweb.org/

Excerpt from above link:

"As web developers, we are responsible for shaping the experiences of user's online lives. By making choices that are ethical and user-centered, we create a better web for everyone."

Hope it helps and guides us in creating a better web for everyone :)

Did you know that MySQL has stated principles for its products as well as for its employees. It's a bit more substantial than your average mission statement blah ;-)
Every person who once signed up to be an employee of the original MySQL AB essentially also signed for upholding these principles, but perhaps you haven't seen them. Since it is public info, why not take a peek!

To me personally, both lists have always felt mainly like a written down description of how Monty (MySQL's original author and co-founder of MySQL AB) likes to work (and I do see that as a positive thing). The product ones get quoted often enough, but not the employee ones, so here's they are:
We want the people working on MySQL to:

• Subscribe to the Open Source philosophy
• Aim to be good citizens
• Prefer partners that share our values and mindset …