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diff --git a/toolkit/docs/javascript-logging.md b/toolkit/docs/javascript-logging.md
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@@ -76,6 +76,9 @@ lazy.logConsole.error("Something bad happened");
lazy.logConsole.debug("foo", 123)
```
+**Note:** Workers are not able to access preferences, and therefore must use
+`maxLogLevel` rather than `maxLogLevelPref`.
+
### Other Options to console.createInstance
`console.createInstance` may be passed other options. See