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A bug is sending YouTube’s net participant into an infinite loop of lag

A photo of the new YouTube playback UI as of October 2025.

Joe Maring / Android Authority

TL;DR

  • YouTube’s net participant apparently has a rendering bug that sends browsers into an infinite loop of visible modifications.
  • The fixed web page rendering loop is inflicting processor and RAM utilization to skyrocket, with customers reporting reminiscence consumption within the gigabytes.
  • Customers with browsers affected by the bug are noticing excessive lag, stuttering, and body drops throughout video playback.

YouTube customers are reporting points with the platform’s net participant, with the location inflicting unexplained browser lag and excessive reminiscence utilization. The stutters, body drops, and RAM consumption are affecting customers of a number of browsers, together with Firefox and Courageous, in keeping with posts (1, 2) on Reddit.

The builders on Mozilla’s discussion board say that the “ytd-menu-renderer” tag, which homes the like, dislike, and share buttons, is inflicting the visible bugs. This can be a versatile menu that dynamically exhibits and hides buttons primarily based on the accessible display screen width. The builders clarify that “ytd-menu-renderer” works by eradicating one button robotically if they’re overflowing on the display screen, and placing the buttons again when the menu ingredient widens. The code is meant to make sure solely the buttons that match in your display screen comfortably are proven.

YouTube Web Player Bug Screenshot

Nevertheless, the developer feedback level out that “hostElement.clientWidth” grows when “ytd-menu-renderer” robotically hides a button. This causes YouTube’s code to assume the menu space is huge sufficient to suit the button, so it provides the button again. In fact, since there isn’t really sufficient visible area, “ytd-menu-renderer” removes the button once more. The menu container expands as soon as once more, and also you in all probability get the thought. It’s a unending cycle that forces your browser and PC to maintain calculating, resizing, and rendering YouTube’s versatile menu.

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This bug locations additional pressure on a person’s system assets. Customers noticed their browser’s RAM utilization spike from a number of hundred megabytes to consuming a number of gigabytes after trying to play a YouTube video. Others seen their CPU core utilization skyrocket whereas utilizing YouTube’s net participant, as documented by one other Reddit publish.

The YouTube net participant rendering bug is affecting customers throughout a number of browsers, together with Courageous, Firefox, and Microsoft Edge. Mozilla is trying into the infinite loop difficulty because it pertains to its Firefox browser, nevertheless it’s unclear when a repair on the YouTube facet is perhaps accessible.

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