Chrome extension icons as shown in the picture below. How to Use Chrome's Add-on Manager — Chrome Web Store Apr 29, 2023 – 2. Go to the “Manage Extensions” page in the top right corner of your Chrome browser window and make sure you've turned on the “Allow all sites to make changes” button in the “Allow all sites to make changes to my extensions' preferences” option. If you don't turn this option on, Chrome will prevent you from installing or enabling any new extensions. That's the only way to get a good extension out on the market. 3. If your extensions are enabled for all sites except one, click the Allow all sites to make changes flag. If they are only enabled for one site, click the Disable flag. 4. You can quickly enable/disable and disable/enable any extensions in “Manage Extensions...”. The same page will be available. How to Install and Manage Extensions — Chrome Web Store 1) Click on “Add to Chrome” icon in the toolbar. This opens up the Extensions window. 2) Click on “Install Now.” This will download and install the extension you've chosen. 3) Click “Manage Extensions” icon in the toolbar to find and configure any extensions your computer has installed. Installing a Chrome Extension Using a USB Drive — Chrome Web Store Nov 1, 2023 – 5. Select your Chrome browser from the drop-down boxes in the top right corner of the page. This will take you directly to the Extensions page where you can Install a new extension from the Google Chrome Web Store.