This is a slight modification of this existing Google Docs Dark Mode, linked below. I modified to be a full amoled dark mode, and ported a little of the source code to work on firefox

https://chrome.google.com/webstore/detail/google-docs-dark-mode/lgjhepbpjcmfmjlpkkdjlbgomamkgonb?hl=en

Install

• License: Mozilla Public License 2.0
• Weekly downloads: 136
• Average daily users: 5147
• Rating: 3.0465/5 of 43 ratings
• Created: 2021-04-01 17:31:07
• Last updated: 2021-04-02 08:25:17
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/google-docs-dark-mode/
• API: {1214118e-758f-44ce-b69b-1ec1106297a8}