Web attribution

Graphics in favorite icon/s courtesy of Twemoji. (CC-BY 4.0) 2019 Twitter. No changes have been made to media.
Excerpt from the Twemoji web site (bold is theirs):
Emojis for everyone.
Twitter’s open source emoji has you covered for all your project's emoji needs. With support for the latest Unicode emoji specification, featuring 3,071 emojis, and all for free.
Completely free. (Yes, you read that correctly.)
As an open source project, attribution is critical from a legal, practical and motivational perspective in our opinion. The graphics are licensed under the CC-BY 4.0 which has a pretty good guide on best practices for attribution.
However, we consider the guide a bit onerous and as a project, will accept a mention in a project README or an 'About' section or footer on a website. In mobile applications, a common place would be in the Settings/About section (for example, see the mobile Twitter application Settings->About->Legal section). We would consider a mention in the HTML/JS source sufficient also.
Copyright 2019 Twitter, Inc and other contributors
Code licensed under the MIT License:
Graphics licensed under CC-BY 4.0:

Favorite icon/s courtesy of (John Sorrentino). (C) 2019 John Sorrentino.
Excerpt from the web site terms of use (bold is ours): does not own the files created or generated by users. Images created or generated on may be used in your own projects or commercial projects. It is your responsibility to abide by the licensing agreements listed for each Google Web Font which can be found here [link is missing, but is not applicable though, so no important information detail is missing].

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