Firefox crashes when opening xsiam tenant

PA_nts — Tue, 25 Aug 2026 13:15:32 GMT

Just gauging if just me or anyone having similar issues since a few days now..

suspect after either Windows or FF update recently. Everyone else in FF is fine.. just not XSIAM.

Edge works and forced to use it now 😞

When I log into a XSIAM tenant ( i have multiple) via FF, it loads then crashes with following message:

'Gah. Your tab just crashed.'

Tried private FF window, cleared cache the normal process.. no fix yet.

re-applied updated, rolled back those I could.. no luck.

cheers

Re: Firefox crashes when opening xsiam tenant

susekar — Wed, 26 Aug 2026 02:06:59 GMT

Hello @PA_nts ,

Greetings for the day.

You are not alone—this is a known issue recently reported across multiple Cortex XSIAM tenants where updated versions of Firefox crash when loading the console and dashboards.

Root Cause:

Internal engineering investigation under XSUP-75422 confirmed that the tab crashes are caused by an upstream defect in recent Firefox releases. This upstream browser bug is tracked in Mozilla's Bugzilla as Bug 2065136.

Recommended Workarounds

Use Chromium-based Browsers:
- WebKit/Chromium-based browsers such as Microsoft Edge and Google Chrome are completely unaffected by this defect and load all XSIAM modules and dashboards normally.- Browser Specificity: Chromium-based browsers (Google Chrome, Microsoft Edge) function normally without crashing.
Revert Firefox to Version 153.0:
- If Firefox is required in your environment, engineering recommends temporarily reverting to Firefox 153.0, which does not exhibit the crash behavior.

You can track the progress of the official Mozilla bug report here: https://bugzilla.mozilla.org/show_bug.cgi?id=2065136

If you feel this has answered your query, please let us know by clicking like and on "mark this as a Solution".

Thanks & Regards,
S. Subashkar Sekar

topic Re: Firefox crashes when opening xsiam tenant in Cortex XSIAM Discussions

Firefox crashes when opening xsiam tenant

Re: Firefox crashes when opening xsiam tenant

Root Cause:

Recommended Workarounds