Everything you need to know about bug is sending youtube web player.
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TL;DR
- YouTube’s web player apparently has a rendering bug that sends browsers into an infinite loop of visual changes.
- The constant page rendering loop is causing processor and RAM usage to skyrocket, with users reporting memory consumption in the gigabytes.
- Users with browsers suffering from the bug are noticing extreme lag, stuttering, and frame drops during video playback.
YouTube users are reporting issues with the platform’s web player, with the site causing unexplained browser lag and extreme memory usage. The stutters, frame drops, and RAM consumption are affecting users of multiple browsers, including Firefox and Brave, according to posts (1, 2) on Reddit.
The developers on Mozilla’s forum say that the “ytd-menu-renderer” tag, which houses the like, dislike, and share buttons, is causing the visual bugs. This is a flexible menu that dynamically shows and hides buttons based on the available screen width. The developers explain that “ytd-menu-renderer” works by removing one button automatically if they are overflowing on the screen, and putting the buttons back when the menu element widens. The code is intended to ensure only the buttons that fit on your screen comfortably are shown.

However, the developer comments point out that “hostElement.clientWidth” grows when “ytd-menu-renderer” automatically hides a button. This causes YouTube’s code to think the menu area is wide enough to fit the button, so it adds the button back. Of course, since there isn’t actually enough visual space, “ytd-menu-renderer” removes the button again. The menu container expands once again, and you probably get the idea. It’s a never-ending cycle that forces your browser and PC to keep calculating, resizing, and rendering YouTube’s flexible menu.
This bug places extra strain on a user’s system resources. Users spotted their browser’s RAM usage spike from a few hundred megabytes to consuming multiple gigabytes after attempting to play a YouTube video. Others noticed their CPU core usage skyrocket while using YouTube’s web player, as documented by another Reddit post.
The YouTube web player rendering bug is affecting users across multiple browsers, including Brave, Firefox, and Microsoft Edge. Mozilla is looking into the infinite loop issue as it relates to its Firefox browser, but it’s unclear when a fix on the YouTube side might be available.
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Frequently Asked Questions
A rendering bug in the ytd-menu-renderer tag. It hides buttons that overflow, which makes the container grow, which makes YouTube think there is room for the button, creating an infinite hide-show loop that forces constant re-rendering.
Users across multiple browsers including Firefox, Brave, and Microsoft Edge have reported the issue.
Users saw browser RAM spike from a few hundred megabytes to multiple gigabytes after playing a video, with extreme lag, stuttering, and frame drops.
Mozilla is looking into the infinite loop issue for Firefox, but it is unclear when a fix on YouTube's side might be available.






