Preferences

There are a couple of preferences associated with the Remote Agent:

Configurable preferences

remote.active-protocols

Defines the remote protocols that are active. Available protocols are, WebDriver BiDi (1), and CDP (2). Multiple protocols can be activated at the same time by using bitwise or with the values. Defaults to 3 in Nightly builds, and 2 otherwise.

remote.force-local

Limits the Remote Agent to be allowed to listen on loopback devices, e.g. 127.0.0.1, localhost, and ::1.

remote.log.level

Defines the verbosity of the internal logger. Available levels are, in descending order of severity, Trace, Debug, Config, Info, Warn, Error, and Fatal. Note that the value is treated case-sensitively.

remote.log.truncate

Defines whether long log messages should be truncated. Defaults to true.

remote.prefs.recommended

By default remote protocols attempts to set a range of preferences deemed suitable in automation when it starts. These include the likes of disabling auto-updates, Telemetry, and first-run UX. Set this preference to false to skip setting those preferences, which is mostly useful for internal Firefox CI suites.

The user preference file takes precedence over the recommended preferences, meaning any user-defined preference value will not be overridden.