I think the clear path is launching a new browser (eg Firefox NT) based on Servo engine (coded in Rust) with an HTML UI and an compatibility layer to support le

I think the clear path is launching a new browser (eg Firefox NT) based on Servo engine (coded in Rust) with an HTML UI and an compatibility layer to support legacy plugins from Firefox era (at least the simpler newer API). With great multi process support and rendering done on the GPU.