Mozilla is getting into the world of social link sharing.  With F1, you can add the functionality of sharing a link on Twitter, Gmail or Facebook into the Firefox browser.  This neat add-on has a lot of potential, and is simple enough for anybody to pick up and use.

To share a link with F1, all you need to do is hit the share icon in the toolbar, choose the service you wish to share the link on and type out your short little message to your followers.  Once you then hit share, it will be sent out.  By default F1 works only with Twitter, Facebook and Gmail but I could see other services being included down the road.

Check out this short video to get more details on how F1 works:

Overall, I have to say I am pretty excited to see where F1 will go next.  Will Firefox having an add-on like this put services like AddThis.com out of business?

The Google Reader Watcher add-on is handy to have, because it will check your Google Reader for unread new posts.  You can use this to keep track of how many stories you have yet to read.  Checking Google Reader with this add-on is much more practical than visiting the Google Reader web site several times a day, for those RSS feed addicts out there like me.

Next, I would have to say the Better GReader add-on for Firefox is fantastic for Google Reader fans.

This add-on for Firefox bundles several great Greasemonkey user scripts into one extension.  Better GReader adds useful extra features to Google Reader, like feed favicons, inline article previews, and unread counts in your browser tab.

Want to integrate Google Reader into the Gmail inbox?  If so, check out the Integrated Gmail add-on for Firefox.  It gives you Gmail, Google Calander, Googler Reader, and more all from within your Gmail account.  The most recent revision added:

• Significant Performance Boosts and Reduced Resource Dependence
• (Beta) Google Wave Support
• Native Google Tasks Support
• Schedule Once Meeting Scheduler Integration
• Support for Firefox 3.6

Last but not least, we have Google Redesigned.

Tired of how Google Reader looks?  Want to give it a massive redesign?  This add-on for Firefox gives you a complete redesign of all Google’s most popular services (including Google Reader).

Now, let me know your favorite Firefox extension to use in conjunction with Google Reader.  Is it one of these I mentioned, or do you have another favorite I have yet to check out?  Let me know in the comments.

Also, remember to subscribe to Firefox Facts in Google Reader – cause you’d hate to miss another great collection of tips like this one!

Once installed, you get your own WYSIWYG editor to create and edit your own signature collection.  You can add links via RSS, instant messenger service or social profiles from around the Web too.

Still need more information?  Check out this awesome video tutorial demonstrating what all you can do with this amazing add-on for Firefox.

WiseStamp has gotten praise from all around the Web, from Lifehacker to Mashable – so it is well worth checking out if you need to micro-manage a lot of e-mail signatures, or rotate the one you use around a ‘bit depending on your mood.

It has built in support for these webmail services:

• Gmail
• Yahoo! Mail
• AOL Mail
• Hotmail

As far as social profiles and services you can plug with it, there are almost 50 to choose from, including:  Netflicks, Youtube, Facebook, Flickr, MySpace, Friendfeed, Digg, Google, Blogger, Tumbler, Twitter and many more.

You can pick up the WiseStamp extension for Firefox on the Firefox Add-ons site, and learn more about the amazing tool on their official web site, WiseStamp.com.

There are a lot of Firefox features that don’t get much press, or are quickly forgotten about.  For example, did you know that you could switch to using Gmail or Yahoo! Mail as your default mail client (to handle those mailto links)?

To chance your settings, go to Tools, Options and then click on the Applications tab.  From there, type “mail” into the text box to go to the default mail handler settings.  From the drop down box, you should get several choices, Yahoo! Mail and Gmail being two of them.  Choose the webmail application of your choice, hit the button labeled, “OK” and you are all set.

Now you are ready to use the webmail provider of your choice as your default e-mail application, as far as Firefox knows.

Are you a webmail addict? 

Maybe you share a browser between family members, and you both use different webmail clients?  No matter the reason you need to use it – one thing is for sure.  This plugin is one of the best to make sure you stay up to date with your latest e-mails.

You can also use multiple accounts in a same host. The Web Mail Notifier currently supports:

• mail.google.com(Gmail & Google Apps)
• mail.yahoo.com (yahoo.com, ymail.com, rocketmail.com, yahoo.co.jp)
• mail.live.com(hotmail.com, msn.com, live.com)
• www.daum.net(hanmail)
• www.naver.com
• www.nate.com(nate.com, empas.com)
• and more!

You can pick up the Web Mail Notifier add-on on the Mozilla Add-ons web site.  By far one of the best webmail tools for Firefox.

Here are all the Google services you can quickly show or hide via the extension.

You can customize how much space you want to save with the options across the bottom (by making the menu a toolbar or a drop down menu).  You also have the option of a horizontal or vertical menu.  You can then right-click on your toolbar, go to “Customize” and then drag and drop the GButts Toolbar you created on to your toolbar layout – anywhere you might need it.

If you are a heavy Google user – the GButts add-on should be right up your alley.

The GMail Compactor user script will help you reclaim that space with style.

As you can see, from the picture above, after you install this Greasemonkey user script, everything from your Compose Mail link down to your Contacts link are now minimized into very pretty icons.  As an extra benefit, you also still get the count of how many new messages are in some of your folders, such as Spam.  If you want to maximize the vertical real estate in Gmail, then pick up the Gmail Compactor user script.  (found via Lifehacker)

Along with the unread message count, you also get a red Gmail icon when there is no unread messages:

…and a chat bubble when somebody is trying to chat with you via Gmail:

Here are a few more things new in this version 3 of Gmail FavIcon Alerts:

Now, you can keep tabs on the exact number of unread messages you have! With the power of the <canvas> tag, the unread message count is now dynamically created for your number of unread messages. The font scales well up to 999 unread messages, but higher numbers are still rendered for those with massive unread counts.

If you have Greasemonkey installed, to get this userscript – just head on over to Userscripts.org and hit “Install”.  Gmail FavIcon Alerts 3 is well worth using, if you spend a lot of time in your Gmail inbox.

That is the only places where Xoopit for Gmail shines.  It also lets you:

• Search your stuff, not your messages. Xoopit upgrades Gmail search to show you the photos, videos and files that match what you are looking for.
• Browse photos and videos from YouTube, Flickr, Shutterfly, Kodak and Picasa. Links sent to your Gmail account are automatically collected, saving you the hassle of going to these sites.
• Easily find and access your files in Gmail. Never misplace an attachment again.
• Quick share to friends, Facebook or your blog.
• Do a web search while composing a mail in Gmail and add results directly to your message.
• Get information, contact details and more about the people in Gmail’s conversation view.

All this from your Gmail inbox.  In the long haul, this add-on will not only make your inbox more social, but will also make it more useful as well.  You can learn more about the service at xoopit.com or pick up the add-on directly on Firefox’s Add-on web site.

Better Amazon – The Better Amazon add-on for Firefox highlights listings with free shipping, enlarges product images, cleans up book pages, shortens URLS and more on Amazon.com.  One of the best Amazon.com enhancers for your browser.

Better Flickr – A great complication of Greasemonkey scripts to make Flickr better for your average user.  You have the Flickr buddy icon reply, more user links, photo magnifier, page enhancer and a more feature rich editor.

Better GCal – The Better GCal add-on for Firefox is a favorite of mine.  It allows you to collapse the header and sidebar, wraps event titles, color weekend days, give week numbers and even a few skins too.  Google Calendar never looked so good!

Better Gmail 2 – A handful more of useful features you can add to your Google-powered e-mail client.  Here you have all kinds of useful additions, from macros to attachment icons.  You even have a few more skin choices and hierarchical labels.  Also don’t forget the first one, if your not yet rolled over to “Gmail 2″.

Better GReader – Add a few more popular Greasemonkey scripts into your Google Reader.  You can preview web pages inline in Google Reader, collapse the header and sidebar, get a Mac OS X like skin, add favicons and tons more.

Better YouTube – Enhances YouTube with Greasemonkey user scripts, that offer options like the FlowPlayer “doesn’t start till you hit play” viewer, clean “theater” view, and links to download the video automatically.

Better Lifehacker – I am a BIG fan of Lifehacker, so why not make them “better” too?  This extension enhances Lifehacker.com and other Gawker blogs–like Gizmodo, io9 Jezebel, Valleywag, Gawker, Kotaku, Jalopnik, Defamer–with useful Greasemonkey scripts.

Which is your favorite “Better” add-on for Firefox or which area of the Web would you like to see Gina cover next?