AndyKay de0u I've gone through the process on Vivaldi, Brave, and Edge without success, but I also have a Chromebook so I went through it again on that and it has started flashing! I'll keep you informed.
DeletedUser69 AndyKay I recently tried installing GrapheneOS on my Pixel 9 Pro XL from previous GrapheneOS device using Vanadium and Brave. No amount of trying helped. When I was literally giving up hope, I connected my phone to my son's relatively low end Android tablet and web installer on Chrome worked on the first try. Talk about relief.
AndyKay de0u GrapheneOS is now installed and running. I'm at a loss to know how to thank you for your assistance and perseverence.
AndyKay GOS21606 After your information about Vivadi I tried Brave and then Edge to no avail, but I also have a Chromebook with the Chrome browser and it went through without a single objection. Thanks for pointing that out.