cannot set playwright firefoxUserPrefs for using DRM content

I try to set a firefoxUserPrefs Dict i still have to figure out which prefs are needed because I need to enable DRM content. What I now so far is that one of the needed preference needed is to enable media.gmp-manager.updateEnabled. I can manually activating it after launch in about:config but not with firefoxUserPrefs.

I also need to do the same thing for webkit but I cannot find any place to set any settings? how can I set the experimental features of webkit

playwright = await async_playwright().start()
prefDict = ''
browser = await playwright.firefox.launch(headless=False, firefoxUserPrefs=prefDict)

I tried already these out and none of them are working, what am I doing wrong?

prefDict = {'media.gmp-manager.updateEnabled':true}
prefDict = {'media.gmp-manager.updateEnabled':True}
prefDict = {'media.gmp-manager.updateEnabled':'true'}
prefDict = {'media.gmp-manager.updateEnabled':'True'}
prefDict = [{'media.gmp-manager.updateEnabled':true}]
prefDict = [{'media.gmp-manager.updateEnabled':True}]
prefDict = [{'media.gmp-manager.updateEnabled':'true'}]
prefDict = [{'media.gmp-manager.updateEnabled':'True'}]

[mxschmitt]

Could reproduce it:

from playwright import sync_playwright

with sync_playwright() as playwright:
    browser = playwright.firefox.launch(firefoxUserPrefs={"kekstar": "bar"})
    page = browser.newPage()
    page.goto("http://whatsmyuseragent.org/")
    page.screenshot(path="example.png")
    browser.close()

With env var DEBUGP=1 it gets shown in the logs, but won’t get received on the pw-client level (DEBUG=*). Will investigate further.

[Shinoby92]

testing it out now using prefDict = {“media.gmp-manager.updateEnabled”: True, “media.allowed-to-play.enabled”: True}

media.allowed-to-play.enabled is enabled but still media.gmp-manager.updateEnabled getting ignored