Emilio and I discussed the functionality change. The string recommendation is "Always underline links". The setting is off by default, and when it is off, websites will determine whether or not links are underlined on webpages. When the user selects, "Always underline links," Firefox will override website preferences and always underline links. Flod, since this is so minor, I am flagging you here for localization review (though I don't think it needs it most likely).
Bug 1664278 Comment 10 Edit History
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Emilio and I discussed the functionality change. The string recommendation is "Always underline links". The setting is off by default, and when it is off, websites will determine whether or not links are underlined on webpages. When the user selects, "Always underline links," Firefox will override website preferences and always underline links. The use of "Always" implies overriding website preference. Flod, since this is so minor, I am flagging you here for localization review (though I don't think it needs it most likely).