Google has quietly changed the way Chrome browser adds extensions, blocking automatic installs from all but those downloaded through the company's Chrome Web store.
The motivation for the modification is security. Previously, extensions could be installed by any website without user intervention, an obvious boon for malicious attacks.
“In the latest version of Google Chrome, you must explicitly tell Chrome that you want to install these extensions by adding them through the Extensions page,” Google said
, a way of forcing users to pay attention to non-approved software.