Latest Mozilla Firefox on Windows 7 betas.

[Caveria]

Hi! You may remember this last thread from Windows 2000 running Mozilla Firefox 52.9.0esr and 53.0.3. Here's a Windows 7 build 6931 running latest version of Mozilla Firefox! (ESR, Main, Beta, Developer Edition and Nightly) The same thing I did with Thunderbird! The interface doesn't works. Builds 6469-6910 can only run to 53.0.3. Here's a five hybrid screenshots of Mozilla Firefox.
Mozilla Firefox 60.7.0esr (Not the main latest version, but it gets a security updates)
Mozilla Firefox 67.0
Mozilla Firefox 68.0b3
Mozilla Firefox Developer Edition 68.0b2
Mozilla Firefox Nightly 69.0a1

[stepraddpratama]

i think many apps can run on Windows 7 betas with 6.1 kernel version

[.NETLover3790]

i think many apps can run on Windows 7 betas with 6.1 kernel version

Yep. I ran Firefox (insert latest version of Firefox when I did this, definitely a version of Quantum) on the Windows 7 Beta x64 (build 7000) on my main laptop (Dell Latitude E6430). The display drivers often came up with a black screen (or simply fail to install), but the program itself worked like a treat.

I'm pretty sure around those pre-Beta builds (the 69xx builds between M3 and Beta 1), they had finalized the APIs and the user interface, and were just working on stabilizing the OS and the new APIs. The Windows 7 Beta was definitely farther along than the Windows Whistler Beta in both UI and the API, and even farther along than the Windows Vista Beta 1.