A security researcher has identified at least 35 Google Chrome extensions that may pose risks to user data, with a total of over 4 million installations. Google has issued a warning regarding 16 of these extensions, which could potentially steal user data and facilitate fraud. Concerns have been raised about the implications of Chrome's ability to display partial credit card numbers, leading to fears among users about possible leaks of their credit card information. The findings highlight ongoing security challenges associated with browser extensions and the need for users to remain vigilant.