Chrome Extension Developer for Debugging

I need a freelancer with experience developing chrome extensions to help with a small piece of work. I have built a POC that injects buttons into a site but need someone to get it over the line, debug, test.

Please only apply if you have experience with Chrome Extensions, Javascript and APIs.

Here is the example page. The goal is for buttons to be added to the two pages and when clicked it picks up the correct details (odds, match details, etc)

Note that the goal is to ensure that similar functionality works for related pages (note that DOM is slightly different so needs a bit of work, possibly separate JS scripts for each page but will let you recommend best approach).
Example of total page
https://www.sportspunter.com.au/sports-betting/soccer/brazil/copa-do-brazil/over-under-betting/bragantino-vs-mirassol/total-corners/

Example of handicap page
https://www.sportspunter.com.au/sports-betting/soccer/brazil/copa-do-brazil/asian-handicap-betting/bragantino-vs-mirassol/

Example of match betting page:
https://www.sportspunter.com.au/sports-betting/soccer/brazil/copa-do-brazil/match-betting/bragantino-vs-mirassol/