Check4Change
Check4Change (aka C4C) is a simple extension that allows you to select a part of a web-page, and get notified when it changes.
5,087 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.
4,239 users
Checker Plus for Google Calendar™
See your next events, get meeting desktop notifications, add or snooze events without opening the Google Calendar page!
4,064 users
PubPeer
This plugin adds links to existing PubPeer comments on journal websites and PubMed.
3,954 users
Twitch Live
Twitch Live is a browser extension for Firefox that makes it easy to check which of your favorite Twitch.tv channels are currently live. You can also configure the extension to send you a notification when one of your favorite streams goes online.
3,482 users
Web Messenger
Access to WhatsApp Web from within a toolbar panel and get badge notification of unread threads
3,367 users
Feedly Notifier
Feedly notifier is a tiny extension that keeps you up to date with your feedly subscriptions.
3,180 users
FoxFilter
Now available for Android! Recently called "THE Parental Control for Firefox"! FoxFilter is a personal content filter that helps block pornographic and other inappropriate content.
3,041 users
Widilo.co.uk Cashback Reminder
Get cashback in one click on all your purchases when you shop online with the Widilo Cashback Reminder.
2,970 users
Ban Checker for Steam
Automatically check bans of people you recently played with, your friends, and group members. This add-on is for Steam users, after installing it head over to your recently played page or your friends page. http://steamcommunity.com/my/friends/coplay
2,478 users
Popupblocker
Popupblocker can block every popup. Many websites open new windows with ads, when you try to mark text or click something. This add-on will block these and show a really small notification.
2,449 users
FMHY SafeGuard
An extension that detects starred, safe, unsafe or potentially unsafe sites using the FMHY Filterlist.
2,420 users
WebNowPlaying
A browser extension that provides information and controls for media playing in the browser to external adapters.
2,395 users
Keep Awake (Screen Only)
Keep your computer's screen from turning off with just one click.
2,357 users
