But this is a tedious process, especially if your browser is synced, meaning that you have to perform all of the above on each device that has Chrome installed. However you should note that you’ll need to know the extension’s ID of the add-on you’d like to remove to know which folder to delete, and this ID code can only be seen in Chrome’s Developer Mode. To find these files, follow the path /Users/username/Library/Application Support/Google/Chrome/Default and delete any unwanted folders. Additionally you’ll need to deal with leftover files even after you have finished the uninstall, since extensions are saved to Google’s directory as well.
With that said, don’t forget that sometimes the trash icon won’t appear next to the add-on, and therefore requires the aid of an uninstaller. Extension Removal in Chrome's Developer Mode