All Mail Button for Inbox by Gmail is a Chrome add-on developed by Yuval Karmi. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools subcategory.

This add-on addresses a missing feature in Inbox by Gmail - the ability to view "All Mail", which includes labeled, archived, and sorted mail. By adding a button to the sidebar right under "Reminders", this extension seamlessly integrates with Inbox's design language.

When the button is clicked, it automatically inputs the "in:all" query into the search box and triggers a search event, displaying all mail just like in Gmail. The add-on is lightweight, with less than 50 lines of code and no dependencies, ensuring fast performance.