JuTwitter is a twitter extension which performs various automatic tasks including:-

-- Like Tweets
-- UnLike Tweets
-- Retweets
-- UnRetweet
-- Follow Twitter profiles
-- UnFollow Twitter profiles
-- Make Tweet From Extension
-- Reply To All Visible Tweets

This extension has four tabs/menus.

Home Menu
---------
Home menu has six tasks to do including "Like All", "UnLike All", "Retweet All", "UnRetweet All", "Follow All", "UnFollow All".
Note that these all buttons work when you are logged on twitter and twitter website is opened in your current tab.

More Actions Menu
------------------
In this menu you can add twitter tags and twitter usernames. The extension will remember what you have added. After you add twitter tags and twitter usernames then you can perform actions on that tag or username. 

Stats Menu
----------
Stats menu give you stats about how many actions you have performed through this extension. For example how many likes, unlikes etc

Tweet/Reply Menu
-----------------
In this menu you can make tweet and reply all tweets. The extension also gives you options to add some smiles while making tweet or doing reply all.
Note that reply all works only if you have opened twitter in active tab and also you are logged it.