Pontoon: Update Frisian (fy-NL) localization of Mozilla accounts

Co-authored-by: Fjoerfoks <[email protected]>

locale/fy_NL/settings.ftl

@@ -975,6 +975,8 @@ tfa-row-backup-codes-get-new-cta = Nije koaden krije
 # Shown to users who have no backup authentication codes
 # Button to add backup authentication codes when none are configured
 tfa-row-backup-codes-add-cta = Tafoegje
+# 'This' refers to 'backup authentication codes', used as a recovery method for two-step authentication
+tfa-row-backup-codes-description = Dit is de feilichste werstelmetoade as jo gjin tagong hawwe ta jo mobile apparaat of autentikaasje-app.
 
 ## Switch component
 
@@ -1060,13 +1062,17 @@ se-secondary-email-none = Gjin
 
 tfa-row-header = Autentikaasje yn twa stappen
 tfa-row-enabled = Ynskeakele
+tfa-row-disabled-status = Utskeakele
 tfa-row-action-add = Tafoegje
 tfa-row-action-disable = Utskeakelje
 tfa-row-button-refresh =
     .title = Autentikaasje yn twa stappen fernije
 tfa-row-cannot-refresh =
     Sorry, der is in probleem bard by it fernijen fan autentikaasje
     yn twa stappen.
+tfa-row-enabled-description = Jo account wurdt beskerme troch twa-stapsautentikaasje. Jo moatte ien kear in tagongskoade ynfiere fan jo autentikaasje-app ôf by it oanmelden by jo { -product-mozilla-account }.
+# <linkExternal> goes to https://support.mozilla.org/kb/secure-firefox-account-two-step-authentication
+tfa-row-disabled-description = Help jo account te befeiligjen troch in <linkExternal>autentikaasje-app fan tredden</linkExternal> te brûken as twadde stap om jo oan te melden.
 tfa-row-cannot-verify-session-4 = Sorry, der is in probleem bard by it befêstigjen fan jo sesje
 tfa-row-disable-modal-heading = Autentikaasje yn twa stappen útskeakelje?
 tfa-row-disable-modal-confirm = Utskeakelje