It\u2019s good news for a lot of Google Chrome users, bad news for developers who don\u2019t know how to play by the rules. All Chrome web browsers that mine cryptocurrencies are now banned from the Google Chrome Web Store. The decision was made in an effort to prevent cryptojacking, the practice of using a target computer for multiple mining operations. While Google wasn\u2019t opposed to Chrome extensions that mined crypto, it had placed limits on the functionality. Developers had to describe the mining activity, had to agree that the extension\u2019s only purpose was to mine, and the extension could only conduct one type of mining operation. When Google discovered that the vast majority of developers weren\u2019t playing nicely\u201490% of them, in fact\u2014it decided to pull the plug. One such extension is, or was, Archive Poster. According to its description, it was a way for users to easily interact with posts on social media platform Tumblr. However, the extension was found to participate in cryptojacking activity, mining the altcoin Monero. It has now been removed from the Chrome Store. There are many reasons why Google\u2019s decision is necessary. Apart from the deliberate attempts to bypass controls, cryptojacking extensions can slow down computers, increase the amount of electricity that the computer uses and, sometimes, even cause computer batteries to melt from overheating. The entire time, the user is unaware of what\u2019s going on and has never agreed to participate in the mining activity. In making the announcement of the ban, the company\u2019s Extensions Platform Product Manager, James Wagner, said, \u201cThe extensions platform provides powerful capabilities that have enabled our developer community to build a vibrant catalog of extensions that help users get the most out of Chrome. Unfortunately, these same capabilities have attracted malicious software developers who attempt to abuse the platform at the expense of users. This policy is another step forward in ensuring that Chrome users can enjoy the benefits of extensions without exposing themselves to hidden risks.\u201d Any extensions that are found to have violated Google\u2019s terms will be removed between now and the end of June. Additionally, extensions will be more closely reviewed prior to being added to the store to ensure that they meet the guidelines. The tech giant suggests that all users monitor their computers\u2019 CPU usage to determine if it\u2019s higher than normal, and report any suspicious activity to Google.