Alex here (OL founder), we whipped this up as an experiment this week, so would love any feedback. I hadn't created a Chrome extension before and the docs were really out of date in places, I didn't find a lot of guidance out there outside from the samples Google has up. We ended up putting most of the logic into a library file (main.js) that can be loaded up and either: run by the extension, run by the test suite, or minified and exported to a bookmarklet. I was pretty happy with this solution, take a look at the source if you're building an extension and looking for ideas on how to organize it.
The bookmarklet version (works on all browsers) is available here:
Buying an apartment in New York is actually one of the things that spurred us to start the company. My wife and I wanted to buy an apartment in New York, but by the time we had made our decision, the seller's agent we had been working with was replaced with a new agent by the buyer. The new seller's agent did not want to share the commission and made it very difficult for us to complete the transaction (even though this is illegal). More transparency and fewer big personalities is what we want to bring to the market with our service.
The bookmarklet version (works on all browsers) is available here:
https://www.openlistings.co/extensions