Even though this is written by Samsung it's not bad.

https://www.w3.org/2001/tag/doc/ethical-web-principles

In particular:

* We will prioritise potential benefits for users over potential benefits to web developers
* build web technologies and platforms that respect individuals' rights and provide features to empower them against dangers like [doxing, harassment, etc]
* We must make our websites accessible for people with disabilities
* We must build for users on low bandwidth networks and low specification equipment
* This principle must be balanced with respect for other human rights, and does not imply that individual services on the web must therefore support all speech. (For example: hate speech, harassment or abuse may reasonably be denied a platform).
* We will create web technologies and platforms that can't manipulate our users, complicate isolation or encourage addictive behaviors
* We will consider power consumption when we introduce new technologies to the web