Here are some of the things this add-on can do:

• Hide bookmarks and folder name
• Hide bookmarks and folder icon
• Hide no favicon bookmarks (name or favicon)
• Display bookmarks and folder name on mouse over
• Multi row bookmarks bar
• Auto hide your bookmarks bar(on click and after some time)
• Set opacity for your bookmarks bar
• Place bookmarks bar on top or on page
• You can choose how to center the bookmarks (left, center or right alignment)
• Set favicon size

Want to pick up this handy bookmark add-on for Firefox? You can get the Roomy Bookmarks Toolbar add-on for Firefox from the Firefox Add-ons website.

Here are some of the features of Weather Now:

• simple and catchy design
• automatic geolocation
• multiple cities support
• everything is set after installation
• 3-4 days weather forecast (depending on source)
• supports Celsius and Fahrenheit

Weather now shows you Weather condition in your city together with 4-days forecast wrapped in elegant and simple design. You can say goodbye to all those confusing designs. Want to give it a shot? You can download Weather Now from the Firefox Add-ons website.

YouTube Video and Audio Downloader

Here are a few more customizations and tips worth mentioning:

1. To add/remove the toolbar icon right click on the Firefox toolbar and select “Customize…”
2. To change settings go to Addon-manager -> Youtube video and audio downloader -> Options
3. To get information about Youtube videos such as all possible formats and their download links, first open a video in Firefox and when the toolbar icon is red, middle click on the toolbar button.
4. To extract audio files from FLV video, click on the toolbar button, go to Tools tab and then select Video conversion tool.
5. To extract all embed videos of current page, Ctrl + Left click on the toolbar button

This is a great extension to download YouTube videos in various formats (FLV, MP4, 3GP, WebM) and extract the audio files. You can also optionally download video subtitles if available! Want to try it out? You can download it from the Firefox Add-ons website.

Here is a little more about the add-on from the developers:

This addon brings the much needed relief for the mouse addicts :) You can:

1. Double click anywhere on any tab to close it (no need to find ‘x’ button, which might not even be there)
2. Triple click anywhere on webpage to close the current tab. Optionally, double right click or middle click to close the current tab. For the adventurous, double left click to close is allowed; for the super-conservative, you can disable closing tab by click on page altogether.

Just give it a try – speed is guaranteed!

Want to give the Double Click Closes Tab add-on a shot? You can download it from the Firefox Add-ons website.

Here are the features of PickMe Web:

• Q-PickMe: Quick PickMe means just bookmark the page by selecting the category.
• PickMe: Bookmark your favourite webpages using your custom title, description and tags.
• E-PickMe: Bookmark your favourite webpages without login into your account, just use your email address to bookmark.
• Random: Browse all webpages from PickMe Web with your defined category
• Share: Share the webpage on social networking websites like facebook, twitter and more…
• Pickers: Know who else picked the current webpage.
• Comments: Explore what people say about the current webpage.
• WR-Stats: Know how this domain is performing in the World Wide Web at WebRank Stats
• Options: LogIn, LogOut and view your bookmarks from the toolbar.

PickMe Web is a very interesting online social bookmarking tool. It save your web history, your favorites, create simple bookmarks. Want to give it a shot? You can download this add-on from the Firefox Add-ons website.

With all that is going on currently in the news, a lot of people are double checking their own activity and wondering to themselves, “who might be watching?”. Now, I highly doubt anybody cares to know you are looking up fried chicken recipes – but sometime feeling more secure is enough to make you feel better.

So want to gain a little ‘bit of your privacy back? You can pick up the Twitter Disconnect add-on from the Firefox Add-on website.

Once you capture your content, you can:

• View and Organize your content on http://www.memonic.com
• Share and discuss it with your friends
• Create sets and groups and invite your friends to contribute their knowledge
• Access everything from your iPhone or iPad, even when you are offline
• Publish items or whole sets on Facebook and Twitter
• Save paper and ink: print only the essential parts of webpages
• And much, much more. Check out our tour at http://www.memonic.com/tour

This add-on makes online research easier. It also supports the iPhone, iPad, Android devices, Windows, Mac OSX and tons of other browsers too. Want to give it a shot? You can pick up the Memonic Web Clipper from the Firefox Add-ons website.

Imgur Uploader

Here are the features of this fantastic little extension:

• Quickly upload images
• Upload screenshots of webpages
• Upload cropped screenshots of webpages
• Upload and Edit Images
• Upload images that are copied to your clipboard
• Upload and share images to the most popular social networks and communities

Want to pick it up? You can download the Imgur Uploader from the Firefox Add-on website.

Here are a few of the features of PopVideo:

• Lightweight and robust
• Available for Firefox 3.6+
• Select the video element in the tool menu or click the button on the top of the page to pop out your video
• Supports popular ad-blocking extensions
• Works on the best video sharing sites like Youtube and Vimeo
• Great for Chinese video sites like youku,tudou,ku6,56,youtube,sina,qq,sohu,163,qiyi

PopVideo also supports AdBlock Plus and FlashBlock. Say goodbye to pesky video advertisements. Watch your big screen videos without ads and save time, bandwidth and frustration. Finally, PopVideo allows you to load a video in a new window through a contextual menu by right clicking on the video link. No need to load the video before you pop it out. Yet again, PopVideo makes the internet more fun and more convenient.

You can download PoPVideo from the Firefox Add-ons website.

Via the options, you can set it this is active by default (pausing the video) when you open a new tab. Also, the smart pause feature will go into effect once a tab/window gets hidden or minimized too. If needed you can delay the pausing of the video by X number of seconds.  Want a visual representation? Choose to have the favicon change for the tab when you have the video paused.

Love this add-on to death, it is a good one.  You can pick up the YouTube Smart Pause add-on from the Firefox Add-on website.