Firefox Extension to Send Text and Images via JSON

I am looking for an experienced developer to create a Firefox extension. The extension should be able to grab text and images from a webpage whenever the content changes and send it to a JSON API on a different domain.

Key Features:
- The extension should be able to grab and send both text and images from the target tab.
- Data should be sent to the JSON API when the content of the page changes or when user presses submit button.
- The extension should include a specific user interface with the following elements:
- Status notifications
- Configuration settings page (AccessToken, API URL)
- An entry list (dropdown, populated from API call)
- A refresh button or icon to refresh the entry list
- An 'auto submit' checkbox to automatically send data on page load
- A 'Submit' button to manually initiate the data send
- An 'OK' button for confirmation in certain cases

Ideal Skills:
- Proficiency in developing browser extensions/add-ons, specifically for Firefox. It should also work in TorBrowser, which is based on Mozilla Firefox 115.13.0esr
- Experience with JSON API integration.
- Understanding of CORS policies.
- Familiarity with handling image data in a browser extension.

If you have experience with these technologies and are confident in your ability to deliver this project, I'd love to hear from you.