browser-use publishes the first usable 1.0 release candidate with a rewritten Python engine
๐ November 9, 2026 โข GitHub browser-use , the open-source browser automation project, published release candidate 1.0.0rc4 on GitHub on November 9, 2026 as a pre-release. The repository now counts 120,445 stars and 13,459 forks, and this build is the first 1.0 candidate teams can actually pull and evaluate ahead of the stable tag. The release replaces the engine (per Browser Use release notes).โฆ
GitHub's browser-use project has released a release candidate 1.0.0rc4 of their open-source browser automation tool, marking the first usable version with a rewritten Python engine. The release candidate boasts a significantly reduced codebase, shrinking from 68,815 to 13,154 lines of Python, and introduces a persistent REPL with browser-harness helpers and raw CDP available in the same session.
The core API has been preserved, but new defaults have changed post-install behavior, with llm=None routing to the bu-fast model on the Browser Use gateway. The release candidate also features tighter run limits, a single BROWSER_USE_API_KEY, and Python 3.11 or newer as a requirement. Performance improvements are notable, with the 1.0 ultrafast mode scoring 62.6 on BU Bench v2 at a cost of 0.071 dollar per task and 585 seconds per task.
The rollout notes indicate that rc1 through rc3 did not reach PyPI, so plain pip install browser-use still installs 0.13.14 until 1.0.0 ships.
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