Basic Settings Misleading
The section 'Basic Settings' states:
$wgFlaggedRevsNamespaces – Sets what namespaces to allow for reviewing. This is an array of integers. Look at the beginning of includes/defines.php to see what integer the default namespaces map to.
However, I after spending quite a while trying to get integers for namespaces to work, I found out the names of the namespaces had to be used. In fact, looking into FlaggedRevs.php, this is what is shown:
# Allowed namespaces of reviewable pages $wgFlaggedRevsNamespaces = array( NS_MAIN, NS_FILE, NS_TEMPLATE );
The text on the Extension page should be updated!