chrome extension

Hi, I've created a bookmarklet to save data from [login to view URL] product pages into a google sheet. It works well for personal use, but I'm looking to share it with a few friends. I converted the bookmarklet into a chrome extension, and it works, but for my friends to use it, they have to modify one of the files with their google web app url. I'd like to make an interface that they can paste their own webapp url into instead of having to go into the Javascript file to change the url. Is this something you could do? The chrome extensions and instructions for its use can be found here: https://docs.google.com/spreadsheets/d/1-kb2w5lvEIe2wAAcolhsOqNMi_N_cfbV9KC8CZ64bbE/edit#gid=23 As an alternate, would it be possible to make a chrome extension that just works - i.e. the only thing the user has to do is sign into their google account and all the permissions to access/write to the google sheet from the chrome extension already set up? Would appreciate if you could give me a price and timeline for each option above. I would need everything working 100% by December 5th.