the above text "pop-up" appeared, outside browser-page, while reading content on a non-mozilla forum. the forum does not utilize pop-ups outside browser-page … the forum also does not sanction bs ads (such as this is). is this "alert" part of firefox? would the alert be part of "enable firefox health report" … in preferences/advanced/data-choices/options? (my "fhr" is enabled and telemetry is disabled.)
looking at the image above … notice how the frame is outside the browser-page.
my environment:
- windows-10 (home) 64bit (1607-14393.1198)
firefox (53.0.3 (64-bit))
has anyone else noticed the above intrusion?