Every file that we have saved on our computers has a particular extension. The file extension is added at the end of the filename followed by a dot (.). It tells the operating systems about the ...

If you read through my Lifehacker posts, you can figure out pretty quickly that I’m a fan of browser extensions. I have extensions for adding a dark mode to my browser, one of showing previews of ...

Microsoft hides file extensions in Windows by default even though it's a security risk that is commonly abused by phishing emails and malware distributors to trick people into opening malicious files.

If you can't finish your income taxes by tonight, file a free extension to get an extra 6 months. Katie covered all things how-to at CNET, with a focus on Social Security and notable events. When ...