Firefox Extension

Creation of a firefox extension that will have a list of items. User shoudl be able to add, delete or modify each item. Items will be listed in a Tree type structure (identical to the bokkmarks tree). Also items can be listed in a list ordered by the fields (user defined order). Each item contains a couple of fields including a text description, a number, 2 date fields and a combo with predetermined options and a combo with user defined options. Of course some screen with input for this item is required. Extension should be compatible with firefox 1.0 and 1.5 for linux, windows, mac. IF you have firefox extension programming experience, please show me an example of your work, with an url to your extension / description. Only experienced users in this type of programming will be considered. Please DO NOT bid, if you never programmed a similar product. The usual legal stuff: As usual, by downloading the file, or placing a bid, you accept under international (and US) copyright laws that the code,screens,graphs and usage of this extension and idea belongs only to me the contractor, and that you cannot use or show this code anywhere else under any circumstance. You agree also you will be a ghost code writer in this case.