Hi,
You know, the hardest part of this project is how to send data to your API in chrome extension, because default security rules in chrome block cross domain query. If you want to disable that rule, you must ask the end user disable, it's very hassle for them.
But, i had a trick to bypass this. Now, it's not a big deal anymore.
The rest things, i'm pretty sure about my aesthetic, making UX to be comfortable, friendly and flexible is my best.
So, Hope to work with you.
Thanks.