On Thu, Aug 31, 2017 at 02:00:49PM -0500, Michael Froman wrote:
I’ve seen this behavior too on OSX. I did a restart with all add-ons disabled and could not reproduce. Restarted with all add-ons on, and can reproduce. I narrowed it down to Ghostery. If I disable Ghostery, it no long appears to happen for me. YMMV.
From a quick look at Ghostery, it apparently injects UI elements into content pages to notify you of things it's blocked, and to do that, it queries the page layout state (several times).
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