Hello!
I have read your requirements for this project and have compley understood it:
1. Creating tags array with count.
2. Listing and switching user with provided APIs (along with transitions).
3. Click and redirect to website/account.
I acknowledge your open source work, and I'm willing to participate in developing and improving it.
The reason why you should hire me is that, firstly, I have a sound knowledge of working with browser extensions. I'm have recently worked on a chrome extension project which will be soon published on the Chrome Store. Secondly, I like working with open source projects. They offer much to learn and contribute. I will be available to be working on additional open source projects in the future as well.
I'm optimistically looking forward to hear from you. If you want to discuss about the project before you hire me, we can have a chat conversation.