I’m planning to ship a fully branded desktop + mobile browser powered by the Chromium engine and I need an experienced developer (or small team) who can take it from codebase setup to store-ready builds on all four major platforms—Windows, macOS, Android and iOS. Core requirements • Chromium at the heart, with all rendering and security patches kept current. • Built-in ad blocking so users browse distraction-free out of the box. • Theme engine that lets users switch between several preset color schemes as well as load their own custom themes. • A classic, toolbar-centric UI—think familiar menus, status bar and a tidy tab strip rather than today’s minimalist chrome. • Password-based sign-in for user profiles, bookmarks and settings sync; no other auth methods needed right now. Deliverables 1. Source code in a private Git repo, well-structured and documented. 2. Signed installers for Windows (.exe/.msi) and macOS (.dmg). 3. Production-ready APK for Android and an Xcode archive / TestFlight build for iOS. 4. Quick start document that shows how to build, package and push updates on each platform. Acceptance The browser must start, load pages, honour ad-block rules and switch themes consistently across all four platforms. UI elements should match the classic layout spec and password profile sign-in must work locally without crashes or data loss. I also need a customized toolbar within Browser with 6 icons. Each button will take user to different URL. I should be able to change it from the backend as and when required. If this sounds like your wheelhouse, tell me which cross-platform framework or build chain you prefer for Chromium forks and link to any similar work you’ve shipped.