Is there anybody out there making money on browser extensions? I wonder if any business models are based on that (most browser extensions are free / just an addition to the main product).
Products making money from browser extensions aren't traditionally thought of as browser extensions. 1password, bitwarden, and others are a good example. These are password managers, but the most common way of using them is via an extension.
Thanks! That's exactly my point! Browser extensions are rarely an independent business model, they are usually connected with some bigger project / platform and the extension is just an additional thing.
VPN and adblock are good examples of extensions that give real value to the user. When it comes to writing code for someone, I was more interested in the idea for a startup and its business model.