AFAIK, the matching should just be done based on the executable name. See: src/util/u_process.c The process name likely differs for the content processes for the browser. You might need both qutebrowser and QtWebEngineProcess blacklisted: <application name="qutebrowser" executable="QtWebEngineProcess"> <option name="adaptive_sync" value="false" /> </application> <application name="qutebrowser" executable="qutebrowser"> <option name="adaptive_sync" value="false" /> </application>