I need a single, reusable Chrome extension that can visit a variety of exhibition or trade-fair websites and pull four fields from every exhibitor listing: company name, country, contact person, email address, and phone number. The extension should place the gathered data into one tidy Excel file I can download at the end of each run. Because I asked for a Chrome extension, JavaScript plus standard Chrome Extension APIs are the natural fit, but if you have another proven stack that still delivers a plug-and-play extension inside Chrome, I am open to it. What matters most is that the code handles different page structures gracefully—whether the listings are paginated, hidden behind “Load More” buttons, or rendered dynamically—and that it avoids duplicating entries. When you hand it over I will install the extension, point it at three sample exhibition sites, and expect to see an .xlsx file containing the four requested columns with no blank rows or malformed characters. Please supply clear setup instructions and leave the source well commented so I can tweak selectors in the future if a site layout changes. Deliverables • Compiled Chrome extension (.crx or unpacked folder) • Read-me with installation and usage steps • Source code with comments explaining key selectors and functions • A short demo video, GIF, or screenshots showing the scraper in action on at least one exhibition site Acceptance criteria • Extracts company name, country, email, phone accurately across multiple sites • Generates a single Excel file per run, UTF-8 encoded, one row per exhibitor • No manual intervention once the start button is pressed other than solving captchas if required • Clean, conflict-free JavaScript that meets current Chrome Web Store policies If anything in this outline needs clarification, let me know and I’ll respond quickly.