The trouble starts when YouTube checks whether all the buttons in its player menu can fit on screen.
The loop reportedly consumes CPU and memory, leading to freezing tabs
Photo Credit: Reuters
YouTube seems to be behind a wave of browser slowdowns, with users reporting heavy lag, stuttering videos, and unusually high memory usage while watching content. The issue affects multiple browsers, including Firefox, Brave, and Microsoft Edge, and in some cases pushes a single tab to consume more than 7GB of RAM. What appears to be a small glitch in YouTube's interface is having a much bigger impact, often maxing out CPU usage and making browsers sluggish or completely unresponsive.
According to a Mozilla Bugzilla thread (via PiunikaWeb), developers investigating the reports say the problem lies in YouTube's flexible menu just below the video player, where buttons such as like, dislike, and share are located. This part of the interface adjusts automatically based on the available screen space.
The trouble reportedly starts when YouTube checks whether all the buttons in its player menu can fit on screen. If there is not enough space, YouTube hides one of the buttons. But removing a button changes the container's width, which makes YouTube think there is room again. It then adds the button back, only for it to overflow once more.
This constant back-and-forth on YouTube is said to create a rapid loop where the layout keeps changing. As a result, the browser is forced to repeatedly recalculate the YouTube page layout, which quickly eats up processing power and memory. Over time, this can cause a YouTube tab to freeze or even slow down the entire browser.
Reports of the YouTube issue have been spreading over the past few days, with users sharing their experiences on forums and Reddit. Some initially thought a recent browser update or ad blocker issue was behind the YouTube lag. However, since the problem is appearing across different browsers, it is more likely tied directly to YouTube.
Mozilla's developers are currently said to be looking into the YouTube issue, but there is no confirmed fix yet. Since the bug appears to come from YouTube's own code, resolving the problem may depend on changes from YouTube before performance returns to normal.
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