A Mozilla CEO says that Google's redesign has made YouTube slower on Firefox and Edge.
Chris Peterson, the software community's technical programmer, tweeted on Tuesday that the video sharing site loads fifth of the rate of non-Chrome browsers due to its architecture, as reported by Sofpedia.
"YouTubes Polymer Redesign relies on the deprecated Shadow DOM v0 API only implemented in Chrome, "he wrote.
"YouTube serves a shadow DOM Polyphile for Firefox and Edge, it's not surprisingly slower than Chrome's native implementation. On my laptop, the first page load carries 5 seconds of Polyfil vs 1 without. Subsequent navigation on the pages can comparable. "
Peterson suggested corrections for both Firefox – Mozilla's browser – and Microsoft's Edge which returns YouTube to an earlier version using add-ons.
He notes that YouTube "Still Serves Pre-Polymer Design" to Microsoft's Internet Explorer 11, launched in 2013 and replaced by Edge, suggesting that Google could have taken the same approach with Edge and Firefox.  None of Google, Mozilla, Microsoft, or Peterson responded immediately to comments requests.
In May, YouTube revealed thateach month and previously said that – so the performance is an important factor in people's choice of browser.
Chrome is the most popular browser and accounts for 59 percent of the site's usage, according to the analytics company StatCounter. Firefox accounts for 5 percent, while Edge has 2 percent.
Last year, Firefox allowedto the Nightly test version of the browser.
On Tuesday, the latest version of Chromeexpanded by displaying a "non-secure" warning for any HTTP site.
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