Osu Songs Marked is a music extension for chrome. also, it is music downloader extension. it's a free extension , it has 123 active users since released its first version, it earns an average rating of 5.00 from 1 rated user, last update is 1985 days ago.
The extension shows the already downloaded songs on the https://osu.ppy.sh/p/beatmaplist page as a different color from others. Songs will be marked as downloaded as you download them. Use the settings page to set the already downloaded songs by either pasting a comma-separated list of the song ids or using the folder picker and choosing the /osu!/songs folder (e.g C:\Users\Username\AppData\Local\osu!\Songs).
You could download the latest version crx file or older version files and install it.
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You could find more help information from osu songs marked support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of osu songs marked.
You could click to report abuse of osu songs marked.