Fearmongering
A classic example of a journalist writing about something they don't understand. First read Google's post on the subject where they explain that for public websites this will only be possible on sites with HTTPS:
"We care deeply about security, so you will notice that new Web capabilities require HTTPS. The Web Bluetooth API is no different"
https://developers.google.com/web/updates/2015/07/interact-with-ble-devices-on-the-web
On top of this a user gesture is required, i.e. the user has to give permission.
With regards to Mozilla's view on the API, they haven't given one, the warning you reference is their default warning for every browser feature that they don't support, see zoom for example:
https://developer.mozilla.org/en-US/docs/Web/CSS/zoom
Biting the hand that feeds IT
