xuuaaannnn/VCLUB-AUTO-HITTER ? reverse-engineered prompt

Build me a Chrome extension that helps me speed through online checkout for things I already plan to buy. I want it to open as an unpacked extension, let me save a few profiles for name, address, email, and phone, then fill those details into checkout forms with one click. It should also make it easy to switch between profiles and keep the setup simple.

Please make it feel fast and clean, with a basic popup or settings page where I can manage the saved info. If there are any site specific quirks, handle the common ones as best you can, and look up current docs online if you need to. I do not want anything shady or anything that tries to bypass site protections, just a smooth personal checkout helper that saves time and reduces typing errors.