Love the add-on, but I recommend few QOL changes after testing it for a day or two, to avoid annoying new users:


1) By default, only these Conditions should be enabled:

- Mark a video as watched once it appears in the browser's history.
- Mark a video as watched once it has the official Youtube watched badge.
- Mark a video as watched once it appears in Youtube's watch history.

1) By default, only this Visualization should be enabled:

- Mark watched videos by slightly fading the thumbnail out.
- Show a textual badge in addition to graying out watched videos.




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I recommend this because I was REALLY annoyed that just opening a video by default marked is at "Watched". I'd rather the video actually watched, is labeled watched, because opening a video to watch it later in a tab marks it as "watched" (maybe add option to delay "Watch" status after a video is opened?).

So that means, with default visualizations options on, suddenly all videos I opened in a tab and didn't watch instantly, show up with grayscale, no YouTube bar, "WATCHED" label on the channel. So now I have no idea which video I actually watched (YouTube bar is a must ON to track this) because every thumbnails is generic looking grayscale. Faded thumbnails work better by default than grayscale (though option to "desaturate" thumbnails a bit would help too)

TBH, I admit, I did not check options initially because there are so many extensions running that the small blue icon didn't even show up on Toolbar for me, it went into overflow. There was no "Options" option when I checked the addon in "Addon & Themes" panel, so I assumed there were no options for this addon, and browsed away oblivious to the fact that there were definitely options.

I hope that is fixed too. Options should be accessible from Addon and Themes section as well when checking extension.



PS: Still a very useful extension. Turning off these extra options made it actually more useful to me than when everything was checked by default.