PluginStats
Watchmarker for Youtube users statistics
Automatically mark videos on Youtube that you have already watched.
Watchmarker for Youtube has approximately 9,000 recorded users on Chrome Web Store, ranking #994 of 7,934 tracked listings.
Rating: 4.40 / 5 from 160 ratings
About Watchmarker for Youtube
Automatically mark videos on Youtube that you have already watched.
Youtube keeps track of your watch history and automatically marks videos that you have already watched. They however only mark recently seen videos, which is kind of disappointing. This addon fixes this issue and keeps track of your entire watch history, such that not only the recently seen videos are being marked.
How can the persistence of the database be ensured? There is an export and import feature, which makes it easy to create a backup of the history. This backup can easily be archived such that you can ensure that you never lose your history.
How can I make sure that the database is complete? The automatic synchronization only considers the recent activity. You are thus encouraged to manually initiate a complete synchronization in the settings, which incorporates as much of your history as possible.
Something is broken, I demand a fix! Please be considerate when leaving a review, this is a free extension that I invest my spare time in. If there is something that does not work then please file an issue on Github where it is easier for me to track.
Description from the Chrome Web Store listing.
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Charts
Images: 30d · 1y · all time · 1600×900 dark
Adoption over time
7/30/90-day growth
Ranking history
Ratings over time
Listing placement
Listing placement
Filled points are observed values; hollow points come from Internet Archive snapshots of the listing page. Dashed segments span periods with no observations — values between points are not interpolated.
Each band is one page of 20. Users on a linear scale. Placement is projected from users, so it can differ from the marketplace's own sort order. Hover a dot to see the listing.
Recent observations
Full history (1)Similar Chrome Web Store Tools plugins
All 20 Watchmarker for Youtube alternatives
Data source
Covers every Chrome Web Store extension with at least 100 users, found through the store's public sitemap. User counts are read from public listing pages. The 10% most-used extensions are refreshed daily, the next 40% weekly and the next 40% monthly; the least-used 10% are not refreshed. Google displays rounded user counts (and caps the display at 10,000,000+), so small changes may not be visible. Rating counts above 1,000 are rounded (e.g. 1.6K).
Listing: https://chromewebstore.google.com/detail/watchmarker-for-youtube/pfkkfbfdhomeagojoahjmkojeeepcolc. First seen Nov 6, 2026; last successful collection Nov 6, 2026. See the methodology.