- Added first‑class proxy support with a new `proxy` option for launch, launchPersistentContext, and launchServer, plus new `firefoxUserPrefs` and `downloadsPath` options.
- Introduced several new APIs such as `browserContext.exposeBinding`, `page.exposeBinding`, `page.getAttribute`, `page.innerHTML`, `page.innerText`, `page.textContent`, `download.suggestedFilename`, `request.postDataJSON`, and a timeout op...
- Implemented numerous bug fixes and stability improvements (e.g., promise returned from `browserServer.kill`, enhanced error reporting, corrected request.resourceType, parallel browser downloads, and various platform‑specific fixes).