Use these steps: Type the URL https://robwu.nl/crxviewer/ on your Google Chrome browser. Copy the URL of the extension you want to use from the Chrome Web Store page and paste it on the box indicated on the page. Click open in this viewer and wait for the page to load. Once done, click on the “manifest.json” file on the left side. Click Ctrl + F and search for “unsafe-eval.” If it exists, then the extension may be unsafe.