FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
Download YouTube videos in all available formats and extract the original audio files
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
Watch streaming media with friends.
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
당신의 모든 기기에서 사용할 수 있는, 안전한 무료 비밀번호 관리자
RoboForm, the #1 ranked Password Manager makes your life easier by remembering passwords and logging you into websites automatically
Offline P2P encrypted password manager & authenticator. Auto-fill Two-Factor Authentication (2FA) tokens.