The best Firefox extensions list Message Reading

• Cooliris Previews - Cooliris Previews for Firefox gives you the power to browse faster and send links instantly.


• Mouse Gestures - Allows you to execute common commands (like page forward/backward, close tab, new tab) by mouse gestures drawn over the current webpage, without reaching for the toolbar or the keyboard.


• Gmail Manager - Allows you to manage multiple Gmail accounts and receive new mail notifications. Displays your account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.


• ReminderFox - ReminderFox is an extension that displays and manages lists of date-based reminders and ToDo’s. ReminderFox does not seek to be a full-fledged calendar system. In fact, the target audience is anybody that simply wants to remember important dates (birthdays, anniversaries, etc) without having to run a fat calendar application.


• NewsFox - RSS/Atom News Reader.


• Yahoo! Mail Notifier - This extension notifies you when new messages arrive in your Yahoo mailbox.


• Gmail Skins - Skins and other extra features for Gmail.


• WOT - WOT helps you avoid disingenuous Internet content by allowing you to learn from others’ experiences. WOT shows you website reputations on your browser, telling you how much other users trust a website. This helps you make better decisions while browsing and avoid phishing, malware, and other types of fraud. Reputations can also be added to web search results, Gmail, Wikipedia, and other selected sites.


• Temporary Inbox - This extension generates random disposable email addresses. You can use these email addresses for registration in forums, adult sites or whereever.


• infoRSS - Displays RSS, Atom, parsed HTML and NNTP feed in a scrolling area the status bar. Compatible with podcasting RSS which can be downloaded directly.
  
  It’s also a good Gmail notifier.