Brave / Chrome Developer Tools Console spamming "Error with Permissions-Policy header: Origin trial controlled feature not enabled" errors

This is usually caused by uBlock Origin extension trying to turn off some privacy‑tracking features which are disabled browser‑wide, and therefore cannot be turned off by the extension.

Solution

Those errors indicate these tracking “features” have been disabled (the Chromium fork you are using probably chose not to include them); they do not indicate a problem nor do they cause any harm.¹⁾

However, if you want to get rid of them in the Console, add the following lines to your uBlock Origin “My filters” section:

*$permissions=browsing-topics=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=private-aggregation=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=compute-pressure=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=idle-detection=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=join-ad-interest-group=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=run-ad-auction=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=attribution-reporting=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=private-state-token-issuance=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter
*$permissions=private-state-token-redemption=(),from=~localhost|~127.0.0.1|~[::1]|~0.0.0.0|~[::]|~local,badfilter

howto, Brave-browser

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Comments

¹⁾

See this comment on uBlockOrigin GitHub.