Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Zoeken in Support

Vermijd ondersteuningsscams. We zullen u nooit vragen een telefoonnummer te bellen, er een sms naar te sturen of persoonlijke gegevens te delen. Meld verdachte activiteit met de optie ‘Misbruik melden’.

Meer info
Deze conversatie is gearchiveerd. Stel een nieuwe vraag als u hulp nodig hebt.
Opgelost Gearchiveerd

FirefoxCP web content prevents mac from sleep

Firefox Probleemoplossing
star-affinity beantwoord
gimeshen
gimeshen

Firefox 56.0.2 macOS Sierra 10.12.6 on iMac 27-in Late 2013

Several instances of "FirefoxCP Web Content" process are preventing Mac from sleep. Restarting Firefox fixes the problem, but then it shows up again after a while. Has been going on for a couple of months.

Apple Support claims the Mac and macOS are fine.

Firefox 56.0.2 macOS Sierra 10.12.6 on iMac 27-in Late 2013 Several instances of "FirefoxCP Web Content" process are preventing Mac from sleep. Restarting Firefox fixes the problem, but then it shows up again after a while. Has been going on for a couple of months. Apple Support claims the Mac and macOS are fine.

Alle antwoorden (3)

cor-el
cor-el
  • Top 25 Contributor
  • Moderator

Gekozen oplossing

You can try to modify multi-process settings to see if this has effect.

  • set dom.ipc.processCount to 1 if it is currently set to a higher value (4)
  • disable multi-process windows in Firefox

You can disable multi-process windows in Firefox by setting these prefs to false on the about:config page.

  • browser.tabs.remote.autostart = false
  • browser.tabs.remote.autostart.2 = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

gimeshen
gimeshen Vraageigenaar

Thanks!!! Seems OK now.

star-affinity
star-affinity

Seems like there's advantages to having multi-process enabled so maybe it would be good to find the reason for why automatic sleep is sometimes prevented?