Custom Chromium-Based Browser with Integrated Chat and Calls

We're seeking an experienced developer to create a custom browser based on Chromium for Android initially, with potential future expansions to Windows and iOS. This initial phase will not exceed $250. Key features should include:

- Enhanced Security Controls
- Uniquely Designed User Interface with chat and call functionalities
- Ad Blocking Capabilities
- Integration with CRM systems
- Seamless uploading to the Google Play Store

The ideal candidate will need experience in Android development, browser projects using Chromium, and knowledge in Play Store regulations and submission standards.