I haven't used it, just commenting on the instructions that jumped out at me.
That said, I do a lot of browser automation, and have done so for over 15 years using all the tools you might imagine, and as I've researched "plain English" approaches, browser-use comes up a lot, along with other options like stagehand, etc.
Also anything older than 3 or 4 months in the LLM era is worth revisiting, since a tool's approach may be solid, but the models of that point in time may have been the weak point.
