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Enhance your web experience with Greasemonkey
You may come across Greasemonkey scripts which does something useful but are clueless what the heck is Greasemonkey. If you already know about Greasemonkey, well go ahead and check out some other post on my blog, but if you don't know read on.
Greasemonkey is a FireFox extension which once installed in FireFox lets you install scripts that make changes to Web Pages. Many times you wish for some feature while browsing your favorite site which isn't there. Like a download link to download videos when you browse YouTube. Install a Greasemonkey script and you'll have that feature. There are thousands of scripts available for various websites and if you know a bit of coding, you can build your own script. The summary is, Greasemonkey provides you with additional functionality for any web page by making on the fly changes to it. And as the scripts are persistent, the changes made to the web page are permanent.
So what's you are waiting for. Go ahead and install this awesome extension and add that little feature to your favorite web page you were always wishing for.
Download Greasemonkey
Find thousands of Greasemonkey scripts
Build your own Greasemonkey script. Tutorial and guide
Thousands of Greasemonkey scripts are available for download out there. But its very hard to find scripts which are really useful. There are way too many scripts to perform the same task. Here I have tried to compile a list of some useful scripts for Gmail. If anybody knows of any scripts which was left out, please be kind enough to comment on it.
Gmail Beautifier 2.31
Hides/Shows ads in Gmail, widens email body, removes beta from Gmail logo (disabled by default), & gives buttons a better look.
Gmail Filter Assistant v0.17
Add an embedded filter management module in message display page, which makes adding a filter much easier
GMailTo
Forces all mailto links to open in GMail
Folders4Gmail
You love Gmail, but you miss folders to sort your emails? Organize your labels in a folder-like hierarchy with the Folders4Gmail userscript.
Gmail Addons
Addon any functionality to the gmail interface. The script comes with Calendar and Chat. (This script replaces 'Enhance Gmail')
Multi-Login GMail, YahooMail, HotMail
Add a drop-down box with your ID's to the WebMail login form.
Gmail Reply To All Button
Adds a "Reply to All" button to Gmail main interface.
Gmail Show Details
Always show details in the most recent message of a gmail conversation. "Details" include the from: reply-to: to: cc: date: subject: and mailed-by: headers.
Google Notebook + Gmail Addons
Adds Google Notebook to Gmail
Gmail Word Count
Adds a button to count the number of words in your current draft. Goes in as a text link to the left of "Check Spelling."
SpamTracker Email Address Generator for Gmail
A script to insert an email address like 'youraccount+currentdomain@gmail.com' so that you can easily filter your Gmail, track who's sending you spam, block senders if necessary. Press "F9" if you're in a text box to insert the email address.
Gmail Signature Float
Moves your signature in Gmail to the top of the message rather than the bottom
Gmail 2.0 Multiple HTML Signatures
Automatically inserts HTML signatures into your Gmail messages based on which address you are sending from.
Gmail Mark Read Button
Adds a "Mark Read" or "Mark Unread" button to Gmail pages (active only when mail items are selected).
Google Mail Customize
You can customize Gmail interface. Works with Gmail (older and newer versions) and Google Apps Mail.
Modified Gmail Macros v. 2.0
Extra (customizable) keyboard shortcuts and macros for Gmail 2.0. Based on the work of Mihai @ persistent.info. Version(date): 20080214.1
How to create Firefox extension from Greasemonkey scripts

Here's an online tool which converts a Greasemonkey script into a FireFox extension (XPI). Its very easy to use, just enter details like GUID, creator name, extension version etc and copy paste the content of the user script and hit the 'Compile' button. The XPI file would be available for download immediately. Once you install the extension into Firefox, you can take advantage of the script even without Greasemonkey.
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