Develop Chrome Extensions -- 3

I need to develop a file (text and pdf) comparison chrome extension. 1. Plugin must be able to directly select 2 files or 2. Plugin must have an option to upload 2 files and show the comparison results. There must be Freemium and Premium Model, In freemium, one can use the extension for 10 PDF. Once exhausted, the user must be redirected to website to purchase a token to use for 1 month. any number extractions can be done. Text can be any number of times. option to select Text / PDF For text comparison, inbuilt comparison logic must be used. (File Formats like text, doc, docx, etc) For PDF comparison, AWS API must be called. [login to view URL] Let me know the budget and timeline.