A recent Youtube Web update has added a canvas whenever the seek bar is visible, an HTML5 canvas pops up. This was not asked for and not needed. If you disable canvases for privacy, this will cause a horrific red bad to cover half the screen until you hide the seekbar. Canvases can be used for fingerprinting, which I’m sure Google is doing here.

  • Kairos@lemmy.todayEnglish
    1·
    9 days ago

    Google uselessly uses the canvas for its reverse image search. And I do mean uselessly - The image you upload is put onto the canvas, then immediately relayed to the server and never used again.

    • Celestus@lemm.eeEnglish
      0·
      9 days ago

      This is probably a clever way of doing native JPEG image conversion on the front end, instead of pulling in (or reimplementing) a universal image conversion library

        • Celestus@lemm.eeEnglish
          1·
          9 days ago

          Yeah, I bet it would be trivial for one of their engineers to whip up a universally compatible, hardware accelerated image file converter in JS, using no external dependencies, and less than 50 lines of code. Hint: it uses Canvas