Firefox become less known for new user after the arrival of Google chrome but Firefox still top of my list. Firefox already grown a lot and with the tons of plugin it enhance my productivity in day to day life. Here are some of my plugin i always install in my Firefox.
ShowIP : Show IP show the IP address of current website open in Firefox in status or AddOne bar. If you right click on it it will allow querying to WhoIS, NetCraft, DNSToolBox etc.
ShowMyIP: This is a similer plugin but instead of showing IP of current website this plugin show our Public IP instead.
FireFTP : It is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.
Navigate to Tools > Web Developer > FireFTP
Navigate to top left corner and select QuickConnect
Navigate to Tools > Web Developer > FireSSH
AdBlockPlus : Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Ghostery : Protect your privacy. See who's tracking your web browsing and block them with Ghostery. Just navigate to your addone panel and if it's showing some values it's mean it find some tracker. You can allow or block the tracker. Can whitelist the website fro tracking and so on.