Yesterday, I started watching a video on YouTube but closed out of my browser (Firefox) only a few minutes into the video.

I’ve got my Firefox set to delete all cookies, history, form data, etc on every close. (Pretty much everything but bookmarks.) The image on this post is a screenshot of my relevant settings.

Today, after having exited my browser and fully shut down my computer for a while, I remembered the video and decided to continue watching it.

In Firefox, I searched for the video (I used the search term “gnu taler” – something worth looking into especially for folks interested in this particular Lemmy community by the way). In the search results, the video I was searching for showed the red bar at the bottom indicating I’d watched only the first few minutes of it.

Which seems weird given that I’d cleared all my browser data since I watched the first few minutes.

So I did some experimentation. I closed my browser completely again and opened it back up, searched in YouTube, and it still had the indicator. I updated to the latest version of Firefox in the Arch package repository. Same indicator. I tried the same in Chromium (which I’ve also got set to delete all browser data on close). Still the indicator. I installed Tor Browser Bundle (specifically torbrowser-launcher on Arch Linux), changed none of the default settings at all, and searched in YouTube. The indicator is present. In Tor Browser Bundle.

W

T

F

?

Anybody have any idea how that’s possible?

My only guesses are:

  • That search is so niche as to be literally unique (which if true makes me sad – I really hope GNU Taler takes off and becomes widespread) and YouTube is using that to identify me.
  • YouTube doesn’t know where I left off at all. Not even my browser knows (because if it was my browser keeping track, it wouldn’t persist between browsers). It’s something else on my system that my browsers depend on or tap into.

The only other pieces of relevant info I can think to share:

  • There’s another video (also about GNU Taler) that I watched all the way through the same day that I started the video this post is about. It doesn’t show any indicator.
  • I tried searching on my phone’s browser. No indicator. But then I’m not sure my phone ever shows indicators. I haven’t tried this on any other devices on my network or anything.
  • I still haven’t watched the video in question. Heh.

Thanks in advance for any insight you might have.