Interesting extensions for Firefox

Okay, so I’m on my USB stick at the library, looking for a good way to have at the internets in Firefox, without being so conspicuous.

I found an extension called Split Pannel [sic], which basically lets me open something in a frame of its own, side by side with what I’ve got going right now.

So, my browser says it’s at FurAffinity.net at the moment, and I’ve got ESL sitting here in a split panel, posting about my experience with it.

Likely, I can probably get away with Meebo that much easier as a result, since I can now squeeze it down into that bit of space.

There’s a small issue with this extension, in the sense that it’s not quite so intuitive, but it’s still worth it.

Also on my list of interesting extensions would be Locationbar².
It makes the location bar much easier to read by adding in clear delimiters for the URL, as well as changing the colors appropriately: For example, the domain is green. Each folder (subdirectory) underneath it is black. Anything that is a query string (think: google.com/?search=The+Internets as an example) is in grey, adding to just how easy it is to distinguish things in the address bar.

What would you consider as an interesting extension for Firefox?