[Feature Request] Ability to set preferences

[Niek]

Some features can't be changed with Chrome flags, but require a manual entry in the data dir Preferences file. For example: the --lang flag is (no longer?) working on macOS, but intl.accept_languages preference works fine.

It would be great if launch() would have an extraPrefs or similar option to pass in an JSON object of preferences to put in the data dir Preferences file.

[christian-bromann]

Created a PR adding this feature request as we need it in WebdriverIO too.

[VincentClair]

Actually, I can't make it work with --lang on Mac (Chrome 93.0.4577.63 (Mac OS 10.15.7)), FR language by default.

    customLaunchers: {
        ChromeEn: {
          base: 'Chrome',
          flags: ['--lang=en']
        },
    }

@Niek mentioned a manual entry in the data dir Preferences file. Where can i find it and how can I set it please ?
Or have you another way to configure language (in order to wait for PR) ?

[Niek]

@VincentClair you need to write the JSON Preferences file to the user data dir prior to starting Chrome. See https://niek.github.io/chrome-features/ (bottom of page) for a list of available settings.

[Niek]

Fixed in #247 - closing issue