Occasionally, a user is unable to handle all the sales generated by using GMass and therefore wants to uninstall GMass.
If you find yourself in this predicament, this is how you do it. It’s a two or three step process to fully remove GMass from your Chrome browser and from your Gmail account.
Remove the GMass extension from your browser by navigating Chrome to chrome://extensions, finding GMass in the list of extensions, and either unchecking the Enabled box it or deleting it entirely with the trash can icon. This will remove the GMass buttons from the Gmail interface.
Disconnect GMass from your Gmail account. Go to Apps Connected to your Google Account, and find GMass, select it, and click REMOVE. This will prevent GMass from connecting to your account and sending emails on your behalf.
If you’ve installed the GMass Add-on, in which case the GMass icon shows up on the right sidebar on desktop and at the bottom on mobile, you can remove the Add-on from your account by going to your Gmail Settings, navigating to the Add-ons tab, and removing GMass.