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Nagios Checker Requires Restart

The statusbar indicator of the events from the network monitoring system Nagios.

Rated 5 out of 5 stars (63)
7,322 users

Skip Cert Error Requires Restart

This Firefox extension enables skipping the SSL/TLS certificate error page, for specific configurable conditions, like self-signed cert or unknown issuer, by adding a temporary exception.

Rated 4 out of 5 stars (38)
7,315 users

Mind the Time

Keep track of how much time you spend on the web, and where you spend it. A toolbar ticker shows the time spent at the current site or the total time spent on the web today. A summary page sums up data for the past 70 days, 10 weeks, and 6 months.

Rated 4 out of 5 stars (99)
7,168 users

WebRank SEO Toolbar Requires Restart

A toolbar that gives Google Pagerank, Alexa, Compete and Quantcast Rank, pages indexed and backlinks in Google, Bing and Yahoo. Bookmark webpages at PickMeWeb.com, view similar websites at SimilarSites.com. Delicious, Digg and Tweet Count.

Rated 4 out of 5 stars (69)
7,088 users

Coupons at Checkout

Never search for a coupon again! Coupons at Checkout uncovers coupon codes automatically at thousands of online stores. Wherever you see a ‘Coupon Code’ box, now just click to see all the retailer's latest coupons! As featured in CNET & Lifehacker!

Rated 5 out of 5 stars (41)
6,790 users

Feedly Notifier Compatible with Firefox 57+

Feedly notifier is a tiny extension that keeps you up to date with your feedly subscriptions.

Rated 4 out of 5 stars (60)
6,739 users

LocalLink Requires Restart

Open local URLs ("file://") from any webpage. Please see the extension homepage for more information.
Note that MozDev has shut down long ago (mailing list etc). Add-On homepage, source code and issue tracker are on GitHub, as linked on this page.

Rated 4 out of 5 stars (13)
6,702 users

Twitch Now

Twitch Now keeps users updated and connected to the Twitch experience outside of website.

Track your favorite streams easily with Twitch Now and get a notification when one of your favorite streams goes online.

Rated 5 out of 5 stars (22)
6,689 users

Show Profile Requires Restart

Display profile hint on window title or customized locations (with or without individual icon).

Rated 4 out of 5 stars (14)
6,171 users

Rain Alarm Extension Requires Restart

This weather app warns you when rain is currently nearing. Instead of forecasting it warns using almost real-time data, which is more precise than any forecast can be.

Rated 4 out of 5 stars (18)
5,725 users

Pray Times! Requires Restart

Display daily Muslim prayer times.

Rated 5 out of 5 stars (348)
5,020 users

Certificate Patrol Requires Restart

Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.

Rated 4 out of 5 stars (68)
5,001 users

Disable HTML5 Fullscreen Alert

Disables "website is now fullscreen" alert

Rated 4 out of 5 stars (46)
4,997 users

Firefox All Aboard 1.6

The Mozilla Firefox Educational Tool

Rated 2 out of 5 stars (8)
4,872 users

Quick Maps

Google Maps in just a second:
• Hover the mouse over an address on a website and Quick Maps displays a Google Map right next to it
• Mark any location name + right-click to look it up directly
• works for US, UK, Germany, Spain, France & many more

Rated 4 out of 5 stars (50)
4,747 users

Checker Plus for Gmail™ Compatible with Firefox 57+

Get desktop notifications, read, listen or delete emails without opening Gmail or Inbox by Gmail & easily manage multiple accounts.

Rated 4 out of 5 stars (64)
4,519 users

CheckFox Requires Restart

This enables quick check/uncheck of checkboxes...

Rated 4 out of 5 stars (51)
4,469 users

FB Chat History Manager Requires Restart

Facebook Chat History Manager,save and view your chat history with friends on Facebook.

Rated 3 out of 5 stars (56)
4,464 users

Forecast: Google™ Weather Compatible with Firefox 57+

A lightweight and accurate weather extension for the entire globe based on Google Technology

Rated 3 out of 5 stars (16)
4,366 users

Tab Suspender (Tab Unloader) Compatible with Firefox 57+

Automatically suspend (hibernate) inactive tabs to free up system resources

Rated 4 out of 5 stars (28)
4,015 users