Upgrade Chrome Extension to Manifest V3

I need an expert Chrome Extension Developer to upgrade my custom Chrome Extension from Manifest V1 to Manifest V3. Google has disabled old versions, and I need it to work with the latest Chrome versions.

Requirements:
- Modify existing extension
- Upgrade to Manifest V3
- Maintain current functionalities: content scripts, background scripts, pop-up interfaces
- No external APIs involved
- No new features needed, just the upgrade

Ideal Skills & Experience:
- Extensive experience with Chrome Extensions
- Deep understanding of Manifest V3
- Proven ability to modify and upgrade existing extensions
- Familiarity with content scripts, background scripts, and pop-up interfaces

Please provide examples of similar work done and estimated timelines.