YouTube on Edge

A report published earlier this week claimed that YouTube’s new design performed poorly in non-Google web browsers and the issue was brought to light by Chris Peterson, Technical Program Manager at Mozilla who detailed the claim on Twitter.

“YouTube page load is 5x slower in Firefox and Edge than in Chrome because YouTube’s Polymer redesign relies on the deprecated Shadow DOM v0 API only implemented in Chrome,” Peterson explained.

“YouTube serves a Shadow DOM polyfill to Firefox and Edge that is, unsurprisingly, slower than Chrome’s native implementation. On my laptop, initial page load takes 5 seconds with the polyfill vs 1 without. Subsequent page navigation perf is comparable,” he added.

YouTube’s new Polymer redesign is substantially slower on these browsers but there’s an easy way to fix this. In this article, we’ll explain how you can fix YouTube performance issues in Microsoft Edge browser by reverting back to old design.

To fix this issue, you would need to return to the old YouTube interface and disable this alleged throttling bug. It is quite a challenge to find a way to disable the new YouTube UI and return to the old interface to address the performance issues in Microsoft Edge.

Fix YouTube performance issues in Microsoft Edge

  • Launch Microsoft Edge and open
  • Once the YouTube is opened, launch the Developer mode by pressing the F12 key on your keyboard.
  • Navigate to the Application tab and double-click Cookies to modify it.
  • This will expand the category and you would need to select the option containing
  • In the right pane, Double-click PREF to modify its value and paste the following code:
  • al=en&f5=30030&f6=8
  • Close the Developer mode and refresh the page.
  • Edge browser will load the old YouTube and the performance issues will be addressed.

Google Chrome is currently the number one desktop browser with a market share of around 60 percent and Microsoft Edge has close to 4 percent market share.

Disclaimer: The claims made in this article is based on tweets from Mozilla engineer. Windows Latest makes no claims or guarantees and shall not be held for anything we say in this article.

About The Author

Mayank Parmar

Mayank Parmar is an entrepreneur who founded Windows Latest. He is the Editor-in-Chief and has written on various topics in his seven years of career, but he is mostly known for his well-researched work on Microsoft's Windows. His articles and research works have been referred to by CNN, Business Insiders, Forbes, Fortune, CBS Interactive, Microsoft and many others over the years.