Server Spy is a small Firefox extension that displays the brand of web servers (e.g. Apache, IIS, etc.) in the right-hand side of the browser window's status bar. When a tab is selected, Server Spy shows the name of the server that has served up the corresponding page.
The following screenshot shows the extension in action. The server name is truncated to the first space character. However, if you click inside Server Spy's area, a dialog pops up and gives the full sever name.
When you hover Server Spy's area, a tooltip gives details about the web server.
Server Spy is compatible with Mozilla Firefox, version 3.5 onwards (users of previous versions of Firefox may use earlier releases of Server Spy). It is available in English and French. The language is automatically selected to match Firefox's language.
Just dowload Server Spy from Firefox Add-ons website, restart Firefox, and you're done.
The current release of Server Spy is 0.2.3. It means that this extension is still in its infancy, and therefore may contain bugs, or even cause data loss! So use it at your own risk...
If you notice bugs or have ideas to improve this extension, feel free to send an e-mail to the author (see below).
Like Mozilla software, Server Spy is tri-licensed under MPL 1.1, GPL 2.0 and LGPL 2.1.
Some wonder what the use of Server Spy is supposed to be: why would people want to know what software websites are running? From my point of view, Server Spy was a pretext to learn Mozilla technologies. And I am somewhat curious, so I find it interesting to know what websites run. Also, some developers seem to be interested in the server-side technology used by nice websites.
I do not want to try and demonstrate that Server Spy is useful for anyone in particular. I know it is a geeky gadget. I find it useful for myself, so I share it with anyone willing to use it. If you find it useful, well, use it! If you ask, I think that Server Spy is not for you, so do not use it. :-)
Server Spy was written by Christophe Jacquet.
Please submit bug reports and feature requests to
Christophe (dot) Jacquet (at) gmail (dot) com.