Why does Chrome show up as my browser when I use Firefox FTP?

How do you see it? Does Chrome pop up, or is it displayed somewhere and if so, could you post a screenshot?

There’s no real relationship between the two browsers otherwise.

shows in the URL address window at top here

Ah, I expected it to be something like that. Chrome (the browser) got its name from the way the exterior (interface) of the browser is (and always has been) called: chrome. The fact that you currently see it in the address bar is an indication that Firefox loaded a piece of interface, namely FireFTP (as opposed to e.g. loading a website over HTTP). It has nothing to do with the other browser and is nothing to worry about. In fact, I’m expecting that if FireFTP will be updated for Firefox 4, that it will hide the address bar completely when opened, so you wouldn’t even see that.

Firefox used a piece of interface from Chrome? Isn’t the code proprietary? And it will continue to use it, just cover it up cosmetically?

Haha, no, the interface of Firefox (and of browsers or perhaps even applications in general) is called chrome. It has always been called this way, even before Google Chrome existed. Compare it to if Google would have created a browser and named it “www”. Then you’d have visited a website and asked “hey, when I visit fluther.com it shows up www as my browser!”

On a side note, while Chrome’s code is proprietary, Chromium‘s isn’t, and it’s nearly identical to Chrome.