Hey there,
This is Shamzi here, hope you're doing well.
I'm a full-stack Web application developer with over 6 years of work experience in the software industry. And I have implemented various chrome extensions for my company where i work full-time, and for many freelancing projects.
I have sound knowledge of the Chrome extensions framework and with my skill-sets in front-end web technologies, I am sure I can help you out with the project described by you here.
In addition to my work experience in developing Chrome Add-ons, I also have worked a little with Intercom. For my current company, we have integrated intercom's widget on our web-application pages. So, I have some know-how of intercom as well.
For the chrome extension you want to be built, I can think of using jQuery for the API calls to intercom, to send the data we need, via the chrome extension. The extension seems to be a straight forward one, and i don't see any major bottlenecks from the first glance.
I hope you would like to discuss this further with me and we can develop something good.
Thank you,
Shamzi