As of yesterday, Firefox Nightly now enables Warp by default. The enabling in Firefox Nightly is seeing 20% faster load times for Win64 Google Docs, 13% faster for the Android Reddit SpeedIndex, 18% faster for PDFPaint, and other measurable improvements elsewhere.
More details via this thread. Nightly is currently tracking Firefox 83 and hopefully this more widespread testing goes well and will remain on for the official release. I’ll be working on some fresh Firefox benchmarks shortly.