Inspiration
- Scrolling insta and getting tired of the same abg thirst trap posts, and whats better than abgs? THE ONE AND ONLY GOAT LEBRON JAMES, LEDADDY, LEGOAT.
- This awesome google extension, LeReplacer, will transform EVERY image on your page into LEGOAT face.
- NO MORE ABGS, NO MORE THIRST TRAP, PURE GOAT!!
- Now you can see LeBron everywhere, making the internet 67% better.
What it does
- Scans all images on a page using Chrome's face detector api.
- Works on dynamic pages: uses a MutationObserver to catch content added by infinite scroll and lazy-loading.
- Replaces all images with faces detecting with a new image featuring a canvas overlay of LeBron's face on the detected face area.
- Secondary feature called fade to LeBron, fades all images on the screen to a photo of LeBron so you can only see LeGoat no matter where you go.
- Connected to a twitter bot https://x.com/Lebronsmygoat_ so that you can post about how many LeBron's you've seen, autogenerates caption with gemini, auto posts with the twitter api, etc.
- Secondary feature mini game which allows you to use your camera and hands to play with a small lebron. Currently has two modes, pet and the other one you need to try out yourself.
How we built it
- A lot of blood sweat and tears.
- Built using javascript, html, css, node.js
Challenges we ran into
- Lot of merge conflicts
- Had to pivot away from our original idea due image to image generation not working.
- LeBrons face swap just did not want to work
- The Twitter API is buns
Accomplishments that we're proud of
- Considering the fact that we had to pivot halfway through the
What we learned
- Experimental browser APIs need graceful degradation and lots of observability.
- Treat local services like prod: health endpoints, structured logs, defensive error messages.
- OAuth is easier when you automate every manual step—scripts and token stores saved the project.
- UI polish matters; having a cohesive Le theme sold the joke and kept testers engaged.
- Strong separation between extension layers simplifies debugging when something breaks.
What's next for LeReplacer
- Make it work for videos.
- Smarter face tagging (detect public figures vs. friends, custom overlays).
- Scheduled meme drops, multi-account posting, and a shared API/CLI for other bots.
- Port extension to Firefox and package a hosted caption service for remote use.
- Let users upload their own ragebait persona packs and share LeBron overlays with friends.
- Explore lightweight ML on-device to reduce reliance on experimental APIs while keeping performance high.
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