Please add a few words related to data privacy

[NoSubstitute]

Hi, Jay!

Please, would you be able to add a few words about data privacy, needed for us to know we're GDPR compatible. I've asked other extension developers to do this, and when it's true the statements are really easy to publish.

See here.
https://github.com/neochief/ReadingLine
https://github.com/denisonlinus/reading-ruler

And they also published those statements in the Chrome Webstore.