I want a Google extension that Search a particular string and if this string found then send a notification on mobile .

Basically i have a google extension which refresh the page every 5 sec and now i want another Google extension which check a string on web page and if this string found on this web page then the extension send a notification on mobile.

For example this is a web page.
Hello abc.

This web page refresh every 5 sec.

If string Hello abc found then extension must send notification on mobile that string found

Google extension are working on chrome browser(laptop)

And i want notification on my mobile .

If ur suggestions doesn't work i will downvote so be careful while suggesting