Hello,
I am facing a strange issue with Firefox 153.0 (64-bit).
Environment:
- Firefox 153.0 (64-bit)
- FortiGate 60F
- FortiOS 7.2.13 build 1762
- HTTPS management on port 8443
Behavior:
- Login to the FortiGate GUI works normally.
- All GUI functions work correctly.
- The integrated Web CLI widget immediately shows:
"Connection lost. Press Enter to start a new session."
When inspecting network traffic, Firefox shows:
main.js:1 (websocket)
NS_ERROR_GENERATE_FAILURE
What has already been tested:
- Cleared cache
- Cleared cookies
- Cleared site data
- Private browsing mode
- Firefox updated to latest version
- Certificate is accepted and TLS 1.3 is working
- No active enterprise policies
- No browser extensions
Important:
The exact same FortiGate and user account work perfectly in Google Chrome.
Has anybody seen WebSocket issues like this in Firefox 153?
Thanks.
