On a new laptop, I installed Lubuntu 18.04 from an.ISO. Then, on the new laptop, I installed Chromium from the available software list. Chromium synced with Chromium on another laptop and inherited the extensions used by the other laptop. But, when I search for extensions on the new laptop, Chromium displays only the installed extensions -- not others that might be available. How can I find out what other extensions are available?
Click on the "hamburger" menu from within the Extension page and click on "Open Chrome Web Store". Alternatively you can go to this URL: https://chrome.google.com/webstore/category/extensions