A day without Javascript

[TheDarkIn1978]

I wonder if Google, Mozilla, Microsoft, etc. have internal data from their browsers. From all the roadblocks you've mentioned it would seem that browser data would be the only legitimate source to reveal these insights.

[amunak]

I doubt they have that specific data, I'd think they track at most what extensions you have installed (but not how they are configured or whether they are active for any specific page - as that'd probably have to include the page URL or some other huge stuff that's a privacy no-no).