We're constantly looking out for ways to make your browsing safer. To that end, we recently changed the way you add extensions that are not in the Chrome Web Store to your browser. Previously, any website could prompt you to add an extension into your browser. 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.
Why the change?
To help keep you safe on the web, we have started analyzing every extension that is uploaded to the Web Store and take down those we recognize to be malicious. Unfortunately, we don't have the ability to take down malicious items promoted on other websites. For instance, online hackers may create websites that automatically trigger the installation of malicious extensions. Their extensions are often designed to secretly track the information you enter on the web, which the hackers can then reuse for other ill-intended purposes.
The updated installation process prevents websites from automatically triggering unauthorized extension installations and gives you more control over the extensions you're adding to Chrome.