The Best Firefox Addons- from gHacks.net

This web page lists the best Firefox addons. These browser extensions add, remove or modify features of the browser itself, for instance interface elements, but also of websites that you may visit in Firefox. Add-ons may add security features to Firefox, improve how your favorite site looks in the browser, may help you download files more easily, or fix annoyances of Firefox itself or of websites. We have grouped all extensions listed here on this page into categories for easier access. Since there are that many, we have decided to separate them on different pages to improve loading times. Updates

• 11.02.2014 - Added KillSpinners, Menu Filter 2, OmniSidebar, Searchonymous
• 09.04.2014 - Added History Deleter

The available categories and add-ons that have been filed in them are: 1. Annoyances

• Anti-Aliasing Tuner
• Bookmarks Duplicate Cleaner
• Click to Play per-element
• GUI:Config
• KillSpinners
• Less Spam Please
• Remove It Permanently
• Session Manager
• Skipscreen
• Yet Another Smooth Scrolling

2. Download Managers / Tweaks

• Bazzacuda Image Saver Plus
• Down Them All
• Download Panel Tweaks
• Download Sort
• Download Statusbar

3. Interface Modifications

• All-in-One Sidebar
• Classic Theme Restorer
• Cleanest Add-on Manager
• Enhanced Steam
• Greasemonkey
• Menu Filter 2
• New Tab King
• OmniSidebar
• Personas Plus
• Prevent Tab Overflow
• Scriptish
• Settings Sanity
• Status 4-Evar
• Stratiform
• Stylish
• Tab Stacking
• Theme Font & Size Changer
• Tile Tabs
• Toolbar Autohide
• Vertical Toolbar

4. Media

• Browser View Plus
• Media Hint
• MediaPlayerConnectivity
• Popvideo
• VLC Context Menu
• YouTube Center
• YouTube.com player Resize

5. Productivity

• Auto Refresh Tabs
• CheckBoxMate
• Customize Shortcuts
• Evernote Clearly
• FindBar Tweaks
• gTranslate
• Monitor Master
• Multi Links
• Multifox
• NOverflow
• Pocket
• Print Edit
• Quickmarks
• Readability
• Save Text to File
• Screengrab Fix Version
• Tab Mix Plus
• Thumbnail Zoom Plus
• Tranquility
• Update Scanner

6. Security and Privacy

• Adblock Plus
• Better Privacy
• BlueHell Firewall
• Calomel SSL Validation
• Cookie Controller
• Cryptocat
• DoNotTrackMe
• FoxyProxy Standard
• Ghostery
• History Deleter
• HTTPS Everywhere
• KeeFox
• LastPass Password Manager
• Masking Agent
• Mozilla Lightbeam
• NoScript Security Suite
• Per-Tab Private browsing
• Preferences Monitor
• RequestPolicy
• Searchonymous
• Self-Destructing Cookies
• Safe

7. Shopping

• Ciuvo
• Converter
• Invisible Hands
• Price Blink
• Simple Currency Converter
• The Camelizer

8. Social Media / Sharing

• 2-Click Like
• AddThis
• ChatZilla
• Reddit Enhancement Suite
• RSS Icon In Awesomebar
• Social Fixer
• Wallflower
• X-notifier

9. Web Developer

• Firebug
• Fire IE
• FireFTP
• Modify Headers
• SearchStatus
• SEO Doctor
• SEO Toolbar by Moz
• SeoQuake SEO extension
• SQLite Manager
• User Agent Switcher

10. Misc Add-ons

• about:addons-memory
• Add to Search Bar
• AniWeather
• Fasterfox
• Fastestfox
• FireGestures
• Flagfox
• Forecastfox Weather
• SQLite Manager
• Unload Tabs

Annoyances

The add-ons and extensions listed in this category fix many annoyances of Firefox or websites that you visit. Anti-Aliasing Tuner

	Use the extension to modify how text is displayed in Firefox. This can be useful if fonts appear blurry in the browser or otherwise distorted, or if you want them to appear cleaner in Firefox.
Review | Go-To

Bookmark Duplicate Cleaner

	There is no easy way to find and delete duplicate bookmarks in Firefox. The extension Bookmark Duplicate Cleaner can scan all bookmarks of the browser automatically to find duplicate ones which you can then delete.
Review | Go-To

Click to Play per-element

	Mozilla changed how click to play works in Firefox 24. Instead of enabling just a single element on a site, Firefox now enabled all of them at once. Click to Play per-element restores the original functionality giving you the option to enable only select elements on websites you visit.
Review | Go-To

GUI:Config

	You can modify advanced config settings by loading about:config in Firefox, or by installing the GUI:Config extension which brings many of those preferences to the Firefox options menu.
Review | Go-To

KillSpinners

	KillSpinners puts an end to web pages that load seemingly endlessly. It makes sure that the loading of sites is stopped automatically when a certain threshold is reached.
Review | Go-To

Less Spam Please

less spam please	The add-on integrates several disposable email services into Firefox, so that you can use them directly in the browser.
Review | Go-To

Remove it Permanently

	Use the browser extension to remove page elements permanently from Firefox. This can be ads, annoying banners or images, Flash elements, and anything else that you do not want to see anymore on websites you visit regularly.
Review | Go-To

Session Manager

	Firefox ships with its own session restore option. Sometimes, you may want greater control over it, for instance if you want to save sessions so that you can open them regardless of what you do with the web browser, and regardless when.
Review | Go-To

SkipScreen

	SkipScreen "skips" intermediary pages when you download files on popular file hosting websites. It speeds up the downloading process as it eliminates the wait time.
No Review Yet | Go-To

Yet Another Smooth Scrolling

	If scrolling is not as smooth as it can be on your end, you may want to give this extension a try as it lets you modify the browser's scrolling experience.You can use it to fine-tine Firefox's scrolling behavior.
Review | Go-To

Download Managers / Tweaks

Download manager addons improve your download experience. They may automate certain processes,let you download files in bulk, or modify where and how files are saved. Bazzacuda Image Saver Plus

	If you download images in bulk regularly, you may find the Bazzacuda Image Saver Plus extension useful for that purpose, as it can automate much of that for you.
Review | Go-To

Down Them All

	Down Them All integrates download manager capabilities into the browser. Use it to display all links, pictures or media on a page to download these files faster to your system.
Review | Go-To

Download Panel Tweaks

	Use the add-on to modify Firefox's new download panel. You can increase the number if items displayed by it by default for example and fix other features of the panel.
Review | Go-To

Download Sort

	The Download Sort add-on gives you better control over the browser's download behavior. You can define custom save locations based on domains or file names and extensions, among other things.
Review | Go-To

Download Statusbar

	Displays download progress information in the browser's status bar area.
Review | Go-To

Interface Modifications

All addons listed here modify the Firefox interface in a way. They may modify certain interface elements, add new options or features to it, or restore elements that Mozilla has removed from Firefox. All-in-One Sidebar

	The add-on extends Firefox's sidebar in many different ways. You can for instance place it on the left or right side of the browser window, open other sidebar items from it easily, or customize what and how it is displayed here as well.
Review | Go-To

Classic Theme Restorer

	The extension enables you to undo certain interface changes that Mozilla introduced with the browser's Australis re-design.You can use it to enable the add-on bar again, display the Firefox menu button, enable small buttons, and several other features that were removed in the wake of the launch.
Review | Go-To

Cleanest Add-on Manager

	Display more add-ons at the same time in the Firefox Add-ons Manager. The extension reduces the size of each row in the manager, and modifies other style elements to achieve that.
Review | Go-To

Enhanced Steam

	Enhanced Steam improves the user experience on the official Steam website. It does so in numerous ways, for instance by highlighting games you already own, pointing out DRM use, or see how much you have spent in total on Steam.
Review | Go-To

Greasemonkey

	Greasemonkey is one of the few extensions for Firefox that add userscript support to the browser.
Review | Go-To

Menu Filter 2

	The extension provides you with the means to remove menu items from Firefox menus. This can be useful to remove items that you never use so that it is easier to identify the items that you use regularly.
Review | Go-To

New Tab King

	If you do not like Firefox's default tab page, use New Tab King to change it completely. From different background images to various interface improvements, for instance options to display the most used websites as text links and with additional usage stats.
Review | Go-To

OmniSidebar

	Firefox is the only browser that supports sidebars by default. You can display bookmarks or the browsing history there.The capabilities are improved when you install OmmiSidebar, as you can display other items in the sidebar as well from that moment on.
Review | Go-To

Personas Plus

	Personas Plus extends the built-in lightweight theme functionality of Firefox. You can use the extension for example to rotate between different designs randomly, or add themes to your favorites so that you can one-click enable them in Firefox.
No Review Yet | Go-To

Prevent Tab Overflow

	Define a minimum width for tabs in Firefox to fit more or less tabs at the same time in the browser's tab bar.The extension offers a set of other features, like dimming tabs that have not been loaded or hiding the tab close button until hovered over.
No Review Yet | Go-To

Scriptish

	Scriptish is one of the extensions that you need when you want to run userscripts in Firefox. It is an alternative to Greasemonkey.
Review | Go-To

Settings Sanity

	Adds settings and preferences back to Firefox that Mozilla has removed in recent versions of the web browser.
Review | Go-To

Status 4-Evar

	Mozilla removed the status bar in Firefox 4, and this add-on has been created to bring it back. It can display status information, as well as the loading progress and download status.
Review | Go-To

Stratiform

	The extension can modify several Firefox related interface elements. Instead of having to install a theme for that, you can install this add-on to modify the colors of tabs among other things.
Review | Go-To

Stylish

	Stylish adds options to Firefox to install so-called userstyles into the browser. They enable you to modify web pages using those styles.
No Review Yet | Go-To

Tab Stacking

	You can only display a certain number of tabs in Firefox's tab bar before scrolling is enabled. Tab Stacking reduces the size of some tabs to their favicon so that you can display more websites at the same time on the tab bar.
Review | Go-To

Theme Font & Size Changer

	There is no direct way to modify the font type or size of the Firefox interface. While you can use the userChrome.css file for that, you may prefer the direct method that the extension provides you with instead.
Review | Go-To

Tile Tabs

	Tile Tabs provides you with the means to display more than one website in a single browser tab. This is achieved by dividing the available space into different locations that you can display sites in.
Review | Go-To

Toolbar Autohide

	Use the extension to define which toolbars are to be displayed at all times, and which you want to be hidden automatically after a set delay.The benefit here is that you get more screen space for displaying websites in Firefox. It is still possible to access the bars by moving the mouse cursor over their area.
No Review Yet | Go-To

Vertical Toolbar

	The extension adds a small vertical toolbar to the side of the Firefox web browser similar to the one that the Opera 12 browser offered. You can add icons to it so that you can fast access them from there instead of the browser's main toolbar or add-on bar.
No Review Yet | Go-To

Click on the links below to go to the the other pages.

Media

Media addons for Firefox change how you consume media in the web browser. They may change how video or audio files are played, may provide you with access to sites that is blocked for you, or how you download or convert media files. Browser View Plus

	Use the extension to open media links directly in programs of choice. You can configure it to open videos in VLC for example, and audio files in Windows Media Player.
Review | Go-To

Media Hint

	Media Hint unblocks web services such as Hulu, Netflix or Pandora if you access them from a location they are not available in.
Review | Go-To

MediaPlayerConnectivity

	The browser addon enables you to load media such as videos or audio files that you discover on the Internet in media players that you have installed on your system.
No Review Yet | Go-To

PopVideo

	Use this extension to display videos in their own window, so that you get to better control them and do not see all the other page elements on the website they were embedded in.
Review | Go-To

VLC Context Menu

	VLC Context Menu adds a right-click context menu item to audio and video links that you can then launch in the media player.
No Review Yet | Go-To

YouTube Center

	YouTube Center allows you to modify many features on YouTube. This includes how videos are buffered or played, or how big the video player should be.
Review | Go-To

Youtube.com player Resize

	The extension allows you to resize the video player interface on YouTube to any size you want, instead of just the three sizes that YouTube offers by default.
No Review Yet | Go-To

Productivity

Productivity add-ons for Firefox improve your workflow on the Internet. They may speed things up through automation or shortcuts, or improve how you work or experience the web in other ways. Auto Refresh Tabs

	Tell Firefox to reload select tabs in the browser in intervals that you specify. Can be great for busy commenting threads, eBay auctions, or webcam photos that get updated regularly.
Review | Go-To

CheckBoxMate

	Use the extension to check multiple check boxes on a web page in one operation. Instead of having to click on all boxes individually to check them, you can simply draw a box around them to select them all at once.
No Review Yet | Go-To

Customizable Shortcuts

	If you want to modify keyboard shortcuts in Firefox, or add new shortcuts, then you can use the excellent KeyConfig, or Customizable Shortcuts for that.
Review | Go-To

Evernote Clearly

	Evernote Clearly turns blog posts, articles and other textual information on the Internet into an easier to read form. It removes page elements from the site so that it is easier to concentrate on the contents.
Review | Go-To

FindBar Tweaks

	If you use Firefox's on-page find feature regularly, you may find this add-on helpful for that. It visualizes finds on a page so that you can jump to the right away using the scrollbar. In addition to that, it can widen the search so that all tabs of the current browser window are included in the search.
Review | Go-To

gTranslate

	Adds options to translate some or all text on any web page using Google's Translate service. It can not only translate text, but also replace text.
Review | Go-To

Monitor Master

	If you run Firefox on a multi-monitor system you may find the Monitor Master extension helpful. It adds additional options to Firefox, for example options to move tabs to another monitor, that increase your productivity.
Review | Go-to

Multi Links

	Multi Links enables you to open multiple links in one operation. You draw a rectangle around links which get opened based on the extension's configuration afterwards.
Review | Go-to

Multifox

	Multifox provides you with options to sign into different accounts on the same website or service at the same time.
Review | Go-To

NOverflow

	The No Tab Overflow extension squeezes more tabs in the browser window by reducing the minimum allowed width of tabs in Firefox.
Review | Go-to

Pocket

	Pocket is a read it later application for Firefox. Use it to save web pages temporarily to read them at a later point in time. Supports synchronization.
No Review Yet | Go-To

Print Edit

	Print Edit for Firefox add options to the print preview dialog. Instead of having to print everything that was selected, it enables you to remove elements that you do not want included in the printout.
No Review Yet | Go-To

Quickmarks

	Quickmark speeds up the filing of bookmarks into select bookmark folders by making them available directly when you click on the bookmark icon in the Firefox browser.
Review | Go-To

Readability

	Readability improves the readability of websites by removing unnecessary page elements and changing the page's font type, sizes, and background and foreground colors.
Review | Go-To

Save Text to File

	Use the extension to save any text that you have highlighted in Firefox to a text document on the local system. It speeds up the saving of information to the local system.
Review | Go-To

Screengrab (fix version)

	Screengrab enables you to take a screenshot of any web page that is open in the Firefox web browser. You can save the screenshot locally or remotely, as the addon offers both options.
No Review Yet | Go-To

Tab Mix Plus

	Tab Mix Plus extends Firefox's tabbed browsing functionality. It modifies how and where tabs are loaded, which buttons are displayed on the tab bar, where the tab bar is being displayed, and dozens of other tab-related features.
Review | Go-To

Thumbnail Zoom Plus

	Lets you hover over images to display a larger version of them on the screen without clicking. Works with many sites and image hosting services.
Review | Go-To

Tranquility

	The extension improves the readability of websites by removing most elements on it that are not needed to read the article. This includes most sidebar and header elements among other things.
Review | Go-To

Update Scanner

	Update Scanner monitors web pages for changes, and will inform you when they occur. You control the frequency of checks, and also what constitutes as a change and what not.
Review | Go-To

Security and Privacy Addons

Security add-ons for the Firefox web browser. These add-ons either add security-related options and features to Firefox, or modify existing ones. Adblock Plus

Adblock Plus is without doubt the most popular ad-blocking extension for Firefox. While it is controversial due to its "acceptable ads" policy, it is used by millions of users on a daily basis. It is a subscription based blocker, which means that you can load additional lists into it -- it ships with one enabled by default that takes care of most advertisement -- so that you can also block annoyances on Facebook, YouTube and other popular sites.

Review | Go-To

BetterPrivacy

	BetterPrivacy improves the handling of other forms of cookies on the system, especially Flash Cookies that browsers tend to ignore for the most part. You can configure the extension to delete those cookies on start or exit, and manage all of them from the options menu as well.
No Review Yet | Go-To

Bluehell Firewall

	The name of the extension should not confuse you. It is an ad-blocker that works very well and is lightweight when you compare it to popular alternatives such as Adblock Plus.
Review | Go-To

Calomel SSL Validation

	This add-on computes a security score for each secure connection that you make in Firefox. The score is visualized by an icon in the main browser toolbar, and a detailed overview when you click on it.In addition to that, it lets you pick cipher restrictions to prevent "too-weak" ciphers, and fix other browser annoyances and issues.
Review | Go-To

Cookie Controller

	Get direct control over cookie permissions in Firefox. You can use it to configure custom cookie rules for individual websites among other things.
Review | Go-To

Cryptocat

	Cryptocat adds encrypted private chat options to Firefox. Use it to communicate with other users in privacy.
Review | Go-To

DoNotTrackMe

	The Firefox add-on blocks hundreds of tracking companies from tracking your movement on the Internet.
No Review Yet | Go-To

FoxyProxy Standard

	FoxyProxy Standard enables you to change the browser's proxy configuration based on the locations you visit in it. You can for instance use a different proxy for localhost requests than you use for requests to work servers.
No Review Yet | Go-To

Ghostery

	Ghostery visualizes connections that your browser makes when you connect to websites. It displays connections that are not that visual usually, including web tracking related ones so that you know which sites track you and which do not.
No Review Yet | Go-To

History Deleter

	The History Deleter extension for Firefox adds two new features to the browser. The first is rule-based history management which enables you to set rules for the deletion of history items. The second is a statistics feature that highlights among other things how often a page has been vis
Review | Go-To

HTTPS Everywhere

	HTTPS Everywhere can force secure connections on websites that allow it but do not enforce those connections automatically.
Review | Go-To

KeeFox

	Users of the popular password manager KeePass can use the KeeFox extension to integrate their password database in Firefox.
No Review Yet |Go-To

LastPass Password Manager

	One of the most popular online password manager available. This Firefox extension syncs your passwords with the online service, and makes them available in the browser comfortably.
Review |Go-To

Masking Agent

	Whenever you connect to an Internet service, you send so called header information to it. These header information contain the user-agent among other things, which may reveal information about your browser, the operating system, and other information about you.
Review | Go-To

Mozilla Lightbeam

	Mozilla Lightbeam highlights the connections that websites make when you open them in the browser.In addition to that, it also links servers so that you can see connections between all the sites you have visited in Firefox.
Read More | Go-To

NoScript Security Suite

	Considered by many the best web browser security add-on ever created.The browser extension blocks all scripts from running on websites by default, offers other security related features that you can make use of, and lets you whitelist trusted sites so that scripts can be run on them automatically no matter what.
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Per-Tab private browsing

	Firefox supports only windowed private browsing modes by default. If you want to enable private browsing for individual tabs in a regular browser window, you need to use this add-on for that.
Read More | Go-To

Preferences Monitor

	The extension monitors changes made to Firefox's preferences -- including those only available on about:config -- and will even block some that are not authorized.The latest version of it includes a clean-up module that you can use to delete custom configurations, for instance left-overs by extensions.
Read More | Go-To

RequestPolicy

	RequestPolicy puts you in full control over cross-site requests that websites want to make when you connect to them. This may block ad scripts, tracking cookies and also cross-site request forgeries and other attacks.
Read More | Go-To

Safe

	The extension highlights secure connections with colors in the tab bar and by painting a small border around the active page. This is done to add visualization to the fact that you are connected via SSL.
Review | Go-To

Searchonymous

	The extension modifies Google cookies in a way that you are no longer tracked when you use Google Search. Even better, it keeps you signed in to the account at the same time, so that you can still access other Google services without having to sign in again.
Review | Go-To

Self-Destructing Cookies

	Use the extension to delete cookies automatically once you leave a website. This takes care of most tracking related cookies as well as other cookies that websites set when you visit them. You can add sites to a whitelist to preserve their cookies.
Review | Go-To

Shopping

Shopping related extensions that display coupons, improve the shopping experience in other ways, or display price comparison options so that you can be sure that you get the best offer. Ciuvo

	Ciuvo notices when you are on shopping sites it supports and will display offers for the products that you are browsing so that you do not miss out on better offers.
Review | Go-To

Converter

	The browser extension can convert currencies on shopping websites for you, which is handy if you shop on non-local sites. It can also convert units which may also come in handy.
Review | Go-To

Invisible Hand

	The Invisible Hand extension for Firefox displays price comparison information directly in Firefox when you visit shopping sites such as Amazon.
Review | Go-To

Price Blink

	PriceBlink is an automated coupon search engine for Firefox and other web browsers that displays available coupons -- those in the service's database -- to you while you browse those websites.
Review | Go-To

Simple Currency Converter

	The Firefox add-on will convert all price information to a currency that you select in the extension's preferences.
Review | Go-To

The Camelizer

	The Camelizer offers access to price history information and options to watch product pages on Amazon, Best Buy or Newegg.
Review | Go-To

Social Media / Sharing

All browser extensions that modify how you work with social media and sharing sites are listed here. 2-click Like

	Most sites load social media buttons automatically by default, which always reports back to the site they link to. If you do not like that, use this add-on to block them from being loaded automatically.
Review | Go-To

AddThis

	The AddThis extension adds sharing buttons directly to Firefox, so that you can share web pages that you visit to social media sites, or by other means such as email.
No Review Yet | Go-To

ChatZilla

	Chatzilla is a full-blown IRC client extension for Firefox. You can use it to connect IRC servers.
Review | Go-To

Reddit Enhancement Suite

	Reddit can be a great website, depending on what your interests are. I'm using it on a daily basis and like the discussions in the groups that I have a subscription for.The Reddit Enhancement Suite extension adds options and features to Reddit. This includes modifications to the user interface, filtering options, or options to ignore users.
Review | Go-To

RSS Icon in Awesomebar

	Previous versions of Firefox displayed an RSS icon into the address bar to indicate that it supported RSS. This extension adds the RSS icon back to the address bar.
No Review Yet | Go-To

Social Fixer

	Social Fixer improves your Facebook experience and lets you remove annoyances on the site. It enables you to hide parts that you do not like, change what is displayed to you, and more.
Review | Go-To

Wallflower

	Social Fixer improves your Facebook experience and lets you remove annoyances on the site. It enables you to hide parts that you do not like, change what is displayed to you, and more.
Review | Go-To

X-notifier (for Gmail, Hotmail, Yahoo, AOL)

	X-Notifier adds notification options for various web mail and social services. It supports Facebook, Twitter, Gmail, Yahoo and generic Pop3 or Imap accounts.
No Review Yet | Go-To

Web Developer

Firebug

	Firefox ships with its own set of developer tools and while that is a great feature, Firebug has more to offer than that which makes it a preferred add-on for web developers using the browser.
Review | Go-To

Fire IE

	Fire IE embeds the Internet Explorer engine in Firefox. This has been designed mainly for two purposes: access IE-exclusive sites in Firefox, and provide web developers with the means to test websites in Internet Explorer.
No Review Yet | Go-To

FireFTP

	You can integrate a fully working FTP client into Firefox. While it is usually better to use a program like winSCP for that, it may work out for you as well, especially if you are not allowed to install desktop software on your work PC.
Review | Go-To

Modify Headers

	Modify Headers provides you with the tools to add, replace or filter HTTP request headers. It is excellent for web development and other testing related tasks.
No Review Yet | Go-To

SearchStatus

	SearchStatus displays a website's Pagerank, Alexa rank and Compete rank in a toolbar in Firefox. It makes available research tools as well, for instance to highlight Nofollow links, create a link report, show the page's keyword density or the robots.txt file.
No Review Yet | Go-To

SEO Doctor

	SEO Doctor is a diagnosis extension for Firefox that webmasters can use to find problems and issues in regards to SEO on their websites. It can visualize the link structure and page rank flow on websites, detect pages that are not indexable by search engines, or point at issues that may reduce the visibility in search engines.
Review | Go-To

SEO Toolbar by Moz

A toolbar with relevant information, a site's page authority and domain authority are displayed directly for each website you visit in Firefox. Here you can also access various SEO-related tools of which the majority require a Moz account.Some don't on the other hand. You can run a basic Page Elements, Page Attributes or Link Data check for example, or change the browser's user agent right from the toolbar.

No Review Yet | Go-To

SEOQuake SEO extension

SEOQuake offers two different tools that make it attractive to SEOs and webmasters. The first displays a toolbar on pages that highlights various metrics, like the site's Alexa rank, Google Pagerank, or pages indexed in the three search engines Google, Yahoo and Bing.The second part displays similar metrics in the search results. What makes SEOQuake interesting, among other things, is that you can customize what it displays to you.

No Review Yet | Go-To

SQLite Manager

	You can use the extension to manage any SQLite database from your computer.
No Review Yet | Go-To

User Agent Switcher

	Sometimes, it may be necessary to use a different user agent. This is development related most of the time, for instance to check if different user agents are redirected to the correct version of a website. At other times, it may be to protect privacy, or to access information that are only available to certain user agents.
Review | Go-To

Misc Addons

All addons that do not fit into any of the other categories are listed here. about:addons-memory

	The extension displays the memory usage of all installed Firefox add-ons.
Review | Go-To

Add to Search Bar

	This add-on provides you with the easiest way to add any search form that you encounter on the Internet to Firefox's list of supported search engines.
No Review Yet | Go-To

AniWeather

	The extension displays weather information for select locations directly in Firefox, so that you do not need to visit weather websites for that.
Review | Go-To

Fasterfox

	You can use FasterFox to tweak the browser's networking and performance settings. It can be used to increase the number of simultaneous requests the browser can make for example.
Review | Go-To

FastestFox

	FastestFox improves Firefox in many different ways. From improving downloads and search, automatic loading of the next page, to looking up information quickly on Wikipedia or other sites.
Review | Go-To

FireGestures

	FireGestures adds gesture support to the Firefox web browser. You can use the extension to add gestures to Firefox to execute commands or features.
No Review Yet | Go-To

Flagfox

	Flagfox displays the country a website is hosted in. This is indicated by a flag displayed by the extension.
No Review Yet | Go-To

Forecastfox Weather

	Forecastfox Weather displays weather information in the Firefox web browser.
No Review Yet | Go-To

Unload Tabs

The more tabs you have open, the more memory is being used for that. If your system is running low on memory because of that, use this add-on to unload tabs and free up memory.

Source: http://www.ghacks.net/best-firefox-addons/