Extension : Multi-highlight on safari

I'm not sure this topic is appropriate for this forum but I'm looking for a Multi-highlight extension or AppleScript for Safari. I using Multi-highlight for Google Chrome at the moment but I would rather do use Safari. https://chrome.google.com/webstore/detail/multi-highlight/pfgfgjlejbbpfmcfjhdmikihihddeeji any idea of a similar extension or a way to implement this in a script?