Long time technical, firefox user. One day starting firefox caused the system to slow unacceptably down. No changes before other than a possible background update from v122. Tried to do a Fresh Firefox v123, but firefox is attempting/constant localhost connections (ports in 40k-65k range) (attached screenshot). It's on a Windows 10 desktop, uninstalled Firefox v123, manually deleted %appdata%\mozilla and %localappdata%\mozilla, reinstalled firefox, as soon as firefox.exe executes, I get constant localhost connection attempts from the "firefox.exe" process (Process Monitor image attached). ran about:processes, found it was the "Network" category causing the problem. Permalink to report... https://share.firefox.dev/4972weA Ran dism, it found no system files had issues. Only firefox has an issue, the system is great without it running. Is this a bug? What does firefox use the localhost connection for? Is there a secondary component that is required by firefox that it is not running on execution that it is looking for?