A simple Chrome extension that displays the current Bitcoin transaction fee estimate for approximately 1-hour confirmation time directly on the extension icon.
- Real-time Fee Display: Shows the current fee rate for 6-block confirmation (~1 hour) on the extension badge
- Automatic Updates: Refreshes fee data every 30 minutes
- Manual Refresh: Click the extension icon to force an immediate update
- Error Handling: Displays error status if API is unavailable
- Caching: Stores fee data locally to minimize API calls
- Download or clone this repository
- Open Chrome and navigate to
chrome://extensions/ - Enable "Developer mode" in the top right corner
- Click "Load unpacked" and select the extension directory
- The Bitcoin Fees extension should now appear in your extensions list
- The extension icon will display the current fee rate (in sat/vB)
- Click the icon to manually refresh the fee data
- Fee data updates automatically every 30 minutes
This extension uses the Blockstream.info Fee Estimates API to fetch current fee rates.
- Storage: To cache fee data locally
- Alarms: To schedule periodic updates
- Host Permissions: Access to
https://blockstream.info/*for API calls
manifest.json: Extension manifest filebackground.js: Service worker handling fee fetching and badge updatesicon16.png,icon48.png,icon128.png: Extension icons
To modify the extension:
- Make changes to the source files
- Reload the extension in
chrome://extensions/ - Test the changes
MIT License - feel free to use and modify as needed.
Contributions are welcome! Please feel free to submit issues or pull requests.