nanobrowser/nanobrowser is an open-source web automation AI agent extension that runs inside the user's browser. The latest release is v0.3.0, and neither the change log for this release nor its public release date appears in the given material. It is written in TypeScript and licensed under Apache-2.0.
In the side panel (the screen docked beside the browser) you give the agent instructions in natural language, and it reads pages and performs clicks, typing, and tab navigation. In Ask mode it requests confirmation before submitting, sending, deleting, or uploading. It supports Chrome and Edge, and the model used for inference can be chosen as cloud or local. The README describes it as a tool that automates everyday work in a real logged-in browser. The repository was created on December 31, 2024 and has collected 14140 stars.
The verifiable scope is narrow. Performance benchmarks and real-world adoption cases are not included in the material, and of the evaluation scores on a 10-point scale, only Momentum 4.0 is given; there are no freshness, technical, or quality scores. Whether browsers other than Chrome and Edge are supported is also not in the material. Because it operates in a logged-in browser, the work is carried out inside a real account. The confirmation procedure before submitting, sending, deleting, or uploading applies only when Ask mode is selected. There is still no basis for handing it a full day's work; it is closer to a candidate worth trying out with a narrowed scope.