Browser Plugin and Software (password manager)

We wish to create a password manager software with browser plugins for IE/FF/Chrome. We wish to clone lastpass. Your job will be to build the browser plugins and windows software, but not the website/web app side of things. You must make it easy for us to install new languages by adding a translated file of the relevant words for menus and buttons etc. If you are able to make it run on Windows and MAC, please say so in your bid and we will be happy to develop for both.