2x Speed is a video controller extension for chrome. it's a free extension , it has 944 active users since released its first version, it earns an average rating of 3.00 from 2 rated user, last update is 1985 days ago.
When this extension is clicked, this extension doubles the playback speed of the video in the page.
You could download the latest version crx file or older version files and install it.
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100% user give 1-star rating. Read reviews of 2x speed
You could find more help information from 2x speed support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of 2x speed.
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but it has 2x speed on youtube though