Match patternとは？

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Match_patterns

Match patterns are a way to specify groups of URLs: a match pattern matches a specific set of URLs. They are used in WebExtensions APIs in a few places, most notably to specify which documents to load content scripts into, and to specify which URLs to add webRequest listeners to.

https://developer.chrome.com/docs/extensions/mv3/match_patterns/
https://docs.microsoft.com/en-us/microsoft-edge/extensions-chromium/enterprise/match-patterns
https://dev.opera.com/extensions/match-patterns/