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Q306: What does "Limited runtime host permissions might break some Tampermonkey features" mean?

A306 If you see this warning message in the Tampermonkey dashboard or popup:

Limited runtime host permissions might break some Tampermonkey features like script update, GM_xmlhttpRequest and others!

it means Tampermonkey does not have full access to all websites — its host permissions are restricted.

This happens when Site Access is set to On specific sites on chrome://extensions/. In that case, Tampermonkey (and your userscripts) can only access the listed sites — features like automatic script updates or GM_xmlhttpRequest requests to other hosts will not work.

How to fix it

1. Go to chrome://extensions/
2. Find Tampermonkey and click on Details
3. Set Site Access to All sites