I cannot speak for the waiting times, but I wrote the extension and I will be clear it is not spying on your browsing. I understand being skeptical, but it is very clear what permissions a plugin has when you install it.
The extension very clearly says when you install it that it only has permission to show Desktop Notifications. It does not have permission to view data on all sites or even Steemit. If it had that ability, it would be listed in the permissions when you install it from the Google Chrome Store.
I used the least amount of permissions required. Most plugins just ask for all permissions, because, well who cares? You can see the difference when installing different plugins. All Chrome Plugins are sandboxed and can only access the resources approved during install.
You can read my previous response here.
RE: @randowhale will be doing some testing!