It is extremely handy to write new tweets as you browse the web or to share a website you are currently viewing.
To post tweet, just write text in the text field and click ‘Enter’ button in the keyboard. To share a URL click the link button or shortcut key Ctrl + Shift + L, the URL will be automatically inserted into your tweet.
This add-on will add an icon to the Firefox status bar and shows the unread tweets, just click on it to read/ post tweets.
More details and install Echofon