From the dropdown menus, specify .

The original Windows Server 2008 limits deployments to the . Attempts to execute higher version installers will trigger kernel compatibility faults or initialization errors. Step-by-Step Installation Process

The absolute final compatible version of Mozilla Firefox for a baseline installation is Firefox 52.9.0 ESR . If your system runs Windows Server 2008 R2 , you can install up to Firefox 115.35.1 ESR . Modern, mainstream releases of Firefox cannot launch on these operating systems due to obsolete system kernels and missing security architecture.

[Server Manager] └── [Security Information] └── [Configure IE ESC] ──> Turn OFF for Administrators To clear these blocks: Open on your desktop workspace. Locate the Security Information summary area. Click Configure IE ESC .

Disable obsolete plugins, legacy Adobe Flash components, and untrusted extension frameworks through the about:addons control panel.

If you would like, I can provide the for silent deployment across a network, or recommend alternative legacy-supported lightweight browsers . Let me know how you want to proceed. Does Firefox support windows server 2008