At Mozilla, we work hard to make Firefox the best browser for you. That’s why we're always focused on building a browser that empowers you to choose your own path, that gives you the freedom to explore without worry or compromises. We’re excited to share more about the updates and improvements we ha...
They are probably extensions, just like pip, pocket, screenshot upload, languages, search engines, themes, etc.
Shipped by default, handled like extensions internally but not exposed to the user. You see it in the extension*.json files in your profile folder.
In that case, I want them exposed just like user-installed extensions, so it’s more obvious how to get rid of them if you want.