Google Add Ons:
Add-ons are scripts that run inside Google Sheets, Docs, Slides, and Forms, but they're built by users.
Google Extensions:
Extensions are mini programs that modify and enhance the functionality of the Google Chrome browser. They extend Google Chrome’s abilities by adding a button next to the address bar, which applies to the current website being viewed.
Google Docs, Sheets, & Slides
Google Forms
Google Docs, Sheets, & Slides
Google Forms
Google Docs, Sheets, & Slides
Google Forms
To remove an add-on from all your files, uninstall it.
Google Docs, Sheets, & Slides
To report a problem with an add-on, click Report an issue.
Google Forms
You'll see your extensions in Chrome as buttons on the toolbar.
Apps and extensions work like regular programs for desktop computers, but they run entirely in the Chrome browser. You don't need to install software or restart your computer.