popCoin is a Chrome add-on that allows you to quickly and easily get notified of incoming and outgoing Bitcoin payments. With popCoin, you can specify any Bitcoin address and receive small notifications at the top right corner of your screen whenever a payment is received or sent. The notifications display the payment amount in both BTC and USD.

One of the key features of popCoin is its focus on privacy. The add-on does not store any personal information and only requires access to Blockchain.info to check address balances. This ensures that your Bitcoin transactions remain secure and confidential.

In the latest version 2.0, popCoin introduces several enhancements. You can now watch up to 6 addresses and assign names or labels to your addresses, making it easier to keep track of your payments. Additionally, various bug fixes have been implemented to improve the overall performance and stability of the add-on.

Previous versions of popCoin have also brought useful updates. Versionintroduced a minor bug fix, while versiondisplayed the current market price from Bitstamp in the bottom right corner of the pop-up. Furthermore, the value of transactions is now displayed in USD.

popCoin versionexpanded its support for addresses, allowing for lengths between 27 and 33 characters in addition to the default 34. It also added a nonintrusive donation button for users who wish to support the developer. Versionaddressed a bug where false notifications were displayed upon restarting the browser.

Overall, popCoin is a useful tool for Bitcoin enthusiasts who want to stay informed about their payments. Its notification system and focus on privacy make it a reliable choice for monitoring Bitcoin transactions. You can find the source code for popCoin on the developer's GitHub repository.