Other ways to say the default browser agent task checks when the default changes from %moz_app_displayname% to another browser. if the change happens under suspicious circumstances, it will prompt users to change back to %moz_app_displayname% no more than two times. this task is installed automatically by %moz_app_displayname%, and is reinstalled when %moz_app_displayname% updates. to disable this task, update the “default-browser-agent.enabled” preference on the about:config page or the %moz_app_displayname% enterprise policy setting “disabledefaultbrowseragent”.