Additional macOS datapoint — 29 September 2026
I can reproduce the same intermittent Browser Connector failure on macOS.
Environment:
macOS 14.4.1 (23E224)
Opera One Stable 136.0.6008.52
Browser Connector enabled
Opera account signed in
“Allow AI connection” enabled
Observed behavior:
The connector works normally for a short sequence of calls — for example, listing tabs and reading tab content — and then a subsequent call suddenly fails with:
UNAVAILABLE: Error code: UNAVAILABLE; Error: McpServerError: Browser not connected. Make sure to enable "Allow AI connection" in the "Browser Connector" and sign in with your Opera account.
At the moment of failure:
Opera is still open
the browser is actively being used
the Opera account is still signed in
“Allow AI connection” is still enabled
no permissions were changed
Opera was not restarted
Toggling “Allow AI connection” off and back on restores the connector, but the same failure returns again later.
I reproduced this repeatedly during active browsing, including while working with WhatsApp Web, so this does not appear to be an idle-timeout issue.
This is the same Opera build already reported in this thread on Windows, so the problem appears to affect at least both Windows and macOS.
The failure is intermittent: the connector can work, fail on the next operation, be restored by toggling the setting, and then fail again during the same active session.