This extension displays the current Ethereum price in EUR on the badge. If you click it, a chart of the last 24h will be displayed.
Unlike other extensions, the price shown on the badge looks correct, even if the price of the cryptocurrency exceeds five digits. The price displayed is an average of various exchanges calculated by CoinGecko. You can install multiple extensions at the same time to monitor the price in both Euros and Dollars (to do this look for my other extensions).