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In der linken Spalte gehen Sie auf Themes und klicken neben Dunkel (deaktiviert) auf Aktivieren.
Öffnen Sie das Firefox-Menü (☰) und klicken Sie auf Add-ons. Warning: Features listed here may or may. Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports. Version 83.0a1, first offered to Nightly channel users on Septem. If you aren't signed in, click the menu button (it looks like three vertical dots) instead Enable Dark Mode On the Web On YouTube's desktop website, click your profile icon at the top right corner of the page. Öffnen Sie die Entwickler-Tools in Chrome/Firefox mittels »Strg+Shift+i« (Windows) oder »alt+cmd+i« (Mac YouTube Night Mode - Get this Extension for ������ Firefox (en-US First, open up YouTube and then, press Ctrl+Shift+K to open up Web Console developer options Rufen Sie auf, Sie müssen mit Ihrem Nutzerkonto bei Youtube eingeloggt sein. The method to activate YouTube Dark Mode in Firefox is pretty much the same as in Chrome. With this dark mode, you can switch between dark mode and normal mode smoothly, no refresh the current watching page (without reducing user experience) Note: I enabled the YouTube Dark Mode in Mozilla Firefox version 52.0.2 on Windows 10. It is very easy to use: just Turn on/off the dark mode by 1-Click. With this dark mode, you can switch between dark mode and normal mode smoothly, no refresh the current watching page (without reducing user experience) Über diese Erweiterung This is a very beautiful night mode (dark mode, dark theme, black theme) for YouTube. About this extension This is a very beautiful night mode (dark mode, dark theme, black theme) for YouTube.