Computershik73/gecko-w10m ? reverse-engineered prompt

Build me a Windows 10 Mobile browser that uses the real Gecko engine inside a UWP app, so old Lumia phones can load modern websites again.

I want a simple phone friendly browser with an address bar, back and forward buttons, tabs, and basic preferences, all wrapped around the engine in a way that can actually run on the Windows 10 Mobile app container. Make sure it builds into a sideloadable app package, signs correctly, and includes the steps to install it on a phone.

Please follow the repo layout and existing docs, and if you need anything current from Microsoft or Mozilla, look up the latest docs online. I’d also like the build to work from the provided scripts as much as possible, so I can run one command and get the engine, package, and appx output without having to piece it together myself.