Do you know a Privacy friendly blue light filter ? Preferably a desktop app but firefox extentions are OK
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Most operating systems have one built in. Is there a feature missing from yours?
I recently switched to Linux Ubuntu, I can not find it in the preferences
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That should be built into the OS, if you’re on anything relatively recent.
Redshift?
If you are using kde plasma
https://userbase.kde.org/Tips/Enabling_the_blue_light_filter_on_KDE_Plasma