After a bit of confusion, I found out why my #Firefox was being laggy on some website despite me turning off Javascript.

Turns out I had set layers.acceleration.disabled while debugging V-Sync.

What this setting does is effectively disable hardware acceleration for a core component of page compositing; making everything laggy.

Mess with settings in a dedicated guinea profile people!

@firefox

  • @Scrollone
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    206 months ago

    Honest question: how do you manage to navigate the modern web with JavaScript off? 99% of websites won’t work.

    • AtemuOP
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      fedilink
      16 months ago

      @Scrollone

      Ah, I was being a bit unclear. It was lagging and I suspected JS to be the cause, so I temporarily turned it off.

      To my surprise however, it was still laggy despite no JS being involved.