contextmenu-source is a productivity chrome extension. it's a free extension , it has 119 active users since released its first version, it earns an average rating of 5.00 from 1 rated user, last update is 3895 days ago.
add JS, CSS link to context menu. see source. https://github.com/kyo-ago/contextmenu-source
You could download the latest version crx file or older version files and install it.
English.
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Quite good. Very Much like the Phoenix extension of firefox.