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Locks the YouTube player timeline YouTube Line adds a slim, always-visible playback progress line to the bottom of the YouTube video player. It helps you track video progress even when YouTube’s native controls automatically fade out. You can customize the line color, progress color, and height from the extension options page. The extension runs only on youtube.com and www.youtube.com. It stores your visual preferences locally and does not collect, transmit, sell, or share user data.
rating_count is the Chrome Web Store ratings count, not a written-review count.