Chrome Web Store

Install as a new user, set up Facebook
Install as a new user, set up Twitter
Install as a new user, set up Facebook, and Twitter
Set up in the last released version, then upgrade to this version (Can be omitted if there is nothing need to be "upgrade")
Install as a returning user
Release on the Chrome Web Store (https://chrome.google.com/webstore/developer/edit/jkoeaghipilijlahjplgbfiocjhldnap)

Firefox Addon

Install as a new user, set up Facebook
Install as a new user, set up Twitter
Install as a new user, set up Facebook, and Twitter
Install as a returning user
Set up in the last released version, then upgrade to this version (Can be omitted if there is nothing need to be "upgrade")
(Firefox for Android) Install as a new user, set up Facebook
(Firefox for Android) Install as a new user, set up Twitter
(Firefox for Android) Install as a new user, set up Facebook, and Twitter
(Firefox for Android) Install as a returning user
(Firefox for Android) Setup in the last released version, then upgrade to this version (Can be omitted if there is nothing need to be "upgrade")
Release on the Firefox Addon (https://addons.mozilla.org/en-US/developers/addon/maskbook/edit)