App for Twitter™ is the easiest way to open and check your Twitter page from your desktop machine (PC, MAC or Linux). Clicking on the toolbar button, renders Twitter in a standalone UI.
App for Twitter™ is designed to operate similar to Chrome Apps. In other words, it opens in a simple and stand-alone popup window (as opposed to the toolbar-panel or sidebar), and once closed, completely clears-off and won't have any further background activities. Having this behavior, it is considered a very lite addon and does not add any additional burden to your browser.
Important Note: App for Twitter™ does NOT belong or related to the official Twitter application/website in any ways. It is an unofficial app that is developed and maintained independently. The official Twitter software is only released for smart phones and the web. This unofficial app (browser addon) is a wrapper to the original Twitter web application and tries to make it usable as a browser plug-in.
Note 1: to start working with Twitter, you can read this FAQ page in Twitter website (https://support.twitter.com/articles/215585).
Note 2: in order to report bugs, please fill the bug report form in the addon's homepage (http://mybrowseraddon.com/twitter-app.html).