I saw a hyperlink with the text 'India success [story]' on the footer of the popup of the extension. Clicking the URL leaded to the YouTube video titled 'Home ivermectin based kits in India'[3].

Checking the code[4] the content for the hyperlink is fetched dynamically from the readaloud website[5].

``` {"id":"ivermectin","text":"India success [story]","link":"https://youtu.be/eO9cjy3Rydc","period":1440} ```

The publisher of the extensions seems to be same as the developer, I have asked for clarifications on their GitHub issues[6].

[1] https://addons.mozilla.org/en-US/firefox/addon/read-aloud/

[2] https://chrome.google.com/webstore/detail/read-aloud-a-text-to-spee/hdhinadidafjejdhmfkjgnolgimiaplp

[3] https://www.youtube.com/watch?v=eO9cjy3Rydc | https://web.archive.org/web/20210923144909/https://www.youtube.com/watch?v=eO9cjy3Rydc

[4] https://web.archive.org/web/20210923143226/https://github.com/ken107/read-aloud/blob/8770c74f323392ba113f50eb1c4014d07b28ffd9/js/popup.js

[5] https://support.readaloud.app/read-aloud/announcement | https://archive.is/QUgkl

[6] https://github.com/ken107/read-aloud/issues/232 | https://web.archive.org/web/20210923150526/https://github.com/ken107/read-aloud/issues/232