https://developer.chrome.com/docs/extensions/develop/ui/themes Apache 2.0 License https://www.apache.org/licenses/LICENSE-2.0 https://github.com/Patrick-Batenburg/GoogleChromeThemeCreationGuide CC-BY-SA-4.0 license https://github.com/Patrick-Batenburg/GoogleChromeThemeCreationGuide?tab=CC-BY-SA-4.0-1-ov-file#readme