Ad clicks are not registered if they come from keyboard

[Softvision-VladBacia]

[Affected versions]:

• Firefox Nightly 57.0a1
• Search Volume Modeling v0.0.1

[Affected Platforms]:

• All Windows
• All Mac OS
• All Linux

[Prerequisites]:

• Latest Search Volume Modeling v0.0.1 was previously installed on a clean profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Make a search in the browser that returns multiple ads.
3. Press "Tab" keyboard button until an Ad is selected.
4. Press "Enter" keyboard button.

[Expected result]:

• The Ad is opened in the same tab and the "ad click" is registered.

[Actual result]:

• The "ad click" is not registered.

[Standard8]

I can reproduce this with Google, but not Yahoo. From what I can tell, if you use use keyboard on google's site, then it doesn't go to the ad server. There's a ping of some sort to their servers, but not the ad one.

[past]

My understanding is that ad click tracking is done using mousedown and touchstart events, so in the case of keyboard selection the ad visit is not counted.