I am a little bit fussy on how my UI should look. I always prefer something simple and the major property which I look forward to is how much an application would use my precious RAM.
Of the many interesting add ons for firefox, I request you to go check out fireftp. Somethings which are good about this is,
1) Opens up in your browser
2) Opens in a separate tab, doesnt disturb what your doing.
3) Dont need to have the head ache of installing another application
4) You can use it on ur smart phone, if it supports firefox addons..hehehehee..
Pretty good…
You can download @ http://fireftp.mozdev.org/