A、It was made up of three sets of brackets. B、It banned ordinary people from using Google. C、It was used to recognize Jewish nam

[1] Google has banned an extension plug-in of its Chrome browser which was being used to identify Jewish names on the internet by surrounding them with three sets of brackets, or parentheses.
    Those identified were subjected to anti-semitic abuse via social media. The symbol has been described as a secret signal because punctuation does not show up in ordinary web searches. [2]Google said that the extension was blocked from its store because it broke its hate speech rules. The tech giant declined to comment further. It was called the "coincidence detector"—a reference to a conspiracy theory about Jewish people and global control.
    The extension was developed by a far-right group called alt-right. It had around 2,500 users and a database of 8,800 common Jewish names which it could pick out on websites reported tech site Mic.
    Questions 1 and 2 are based on the news report you have just heard.
    1. What do we learn about the extension plug-in from the news report?
    2. Why was the extension blocked from Google’s store?