Google Said to Make YouTube Slower on Firefox and other browsers

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YouTube’s new Polymer redesign has brought not only improvements to the video sharing platform, but also a new controversy in the browser world, as non-Google browsers are said to be deliberately slowed down.

The issue was brought to light by Chris Peterson, Technical Program Manager at Mozilla, who revealed on Twitter that a technology that Polymer relies on is only available in Google Chrome, in turn making Firefox and Microsoft Edge slower.

“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.”