Agree with Eddy, it is in the Google Chrome Web Store
See DrWeb’s URL check: https://chrome.google.com/webstore/detail/listango-bookmark-manager/dmbdkkenkdllkpiognpnmlaglmojagnh redirects to https://chrome.google.com/webstore/unsupported/dmbdkkenkdllkpiognpnmlaglmojagnh

Checking: https://chrome.google.com/webstore/unsupported/dmbdkkenkdllkpiognpnmlaglmojagnh
Engine version: 7.0.9.4080
Total virus-finding records: 5402359
File size: 2631 bytes
File MD5: d9815b725309052c067cdd2671780cf8

https://chrome.google.com/webstore/unsupported/dmbdkkenkdllkpiognpnmlaglmojagnh - archive JS-HTML

https://chrome.google.com/webstore/unsupported/dmbdkkenkdllkpiognpnmlaglmojagnh/JSTAG_1[23e][1ec] - Ok
https://chrome.google.com/webstore/unsupported/dmbdkkenkdllkpiognpnmlaglmojagnh - Ok

polonus