Firefox Flatpak unable to load Google.com (infinite loading loop) on Pop!_OS
I am experiencing an issue where Google.com (other google domains work fine) will not load in Firefox, resulting in an infinite loading loop. Other browsers on the same s… (อ่านเพิ่มเติม)
I am experiencing an issue where Google.com (other google domains work fine) will not load in Firefox, resulting in an infinite loading loop. Other browsers on the same system (Brave) work fine.
Here are the steps I have already tried:
Reinstalled Firefox completely
Removed Firefox via sudo apt remove --purge firefox -y
Cleared all user profiles and caches: ~/.mozilla/firefox, ~/.cache/mozilla, ~/.config/Mozilla
Reinstalled via Flatpak
Tested network connectivity outside Firefox
curl google.com works correctly
DNS resolution works via getent hosts google.com in the host system
Checked proxy settings
Ensured “No proxy” is selected in Firefox → did not resolve the issue
Tested in Safe Mode (disabling extensions)
Problem persists, so not caused by extensions
Tried disabling IPv6 inside Firefox
network.dns.disableIPv6 set to true → no effect
Cleared DNS cache inside Firefox
about:networking#dns → clicked “Clear DNS Cache” → no effect
Disabled DNS-over-HTTPS (Secure DNS)
about:preferences#privacy → “Use secure DNS” → disabled → no effect
Disabled HTTP/3 (QUIC)
network.http.http3.enabled set to false → no effect
Verified Flatpak network permissions
flatpak info --show-permissions org.mozilla.firefox shows network access allowed
Inside the Flatpak shell:
flatpak run --command=sh org.mozilla.firefox getent hosts google.com
→ returns only IPv6 address: 2800:3f0:4001:839::200e google.com