Unknown Mozilla dev addon "Looking Glass 1.0.3" on browser

If they state as an explicit principle that no addons/studies are actually enabled unless the user opted in, then I’m going to give them the benefit of the doubt that if that happened to users that did not opt in, it was a terrible mistake (I.e a bug).

I can tolerate bugs, much more than I can tolerate sneaky app behavior. But I hope the statement about explicit opt-in will be repeated, and this will be explained.

At first I thought it must have been users that explicitly had opted in, but with so many users claiming they haven’t, it seems unlikely.

The next possibility is that preview versions have things opt-out instead of opt in (because in preview versions you need more data from users - typical for closed alphas etc) - but then this should be very clearly explained on download/install.

Just installed Firefox a week ago on OS X. Just checked and I have Looking Glass installed. I'm usually very careful when installing software about things like this. I don't recall ever opting in to anything (including error reporting). So my guess is it's a default you have to disable in settings.

I haven’t understood whether this thing is completely inert or actually does anything without opt in.

If it is downloaded and listed without opt-in, but only actually invoked after opt-in, then I’ll call it acceptable (not great, but not terrible either)

The source is at https://github.com/gregglind/addon-wr/

Its startup is controlled by the addon/bootstrap.js file. Per line 22, it's completely inert unless the user manually toggles `extensions.pug.lookingglass` in about:config: https://github.com/gregglind/addon-wr/blob/59659431fd2a75c33...