Support for plugins

[jarkkombrain]

Would it be possible to add support for plugins? For example having possibility to include ghostery would be excellent addition.

Like how PuPHPeteer used to do this.

    $puppeteer = new Puppeteer([
        'js_extra' => /** @lang JavaScript */ "
            const puppeteer = require('puppeteer-extra');
            const StealthPlugin = require('puppeteer-extra-plugin-stealth');
            puppeteer.use(StealthPlugin());
            instruction.setDefaultResource(puppeteer);
        "
    ]);