--- a/browser/browser/preferences/preferences.ftl
+++ b/browser/browser/preferences/preferences.ftl
@@ -285,20 +285,35 @@ network-proxy-title = Net milliþjónn
 network-proxy-connection-learn-more = Fræðast meira
 network-proxy-connection-settings =
     .label = Stillingar…
     .accesskey = S
 
 ## Home Section
 
 home-new-windows-tabs-header = Nýir gluggar og flipar
+home-new-windows-tabs-description = Veldu hvað þú vilt sjá þegar þú opnar heimasíðuna, nýjir glugga, og nýjir flipar
 
 ## Home Section - Home Page Customization
 
+home-homepage-mode-label = Heimasíða og nýjir gluggar
 home-newtabs-mode-label = Nýir flipar
+home-restore-defaults =
+    .label = Endurheimta sjálfgildi
+    .accesskey = r
+# "Firefox" should be treated as a brand and kept in English,
+# while "Home" and "(Default)" can be localized.
+home-mode-choice-default =
+    .label = Firefox Home (Sjálfgefið)
+home-mode-choice-custom =
+    .label = Sérsniðin URL…
+home-mode-choice-blank =
+    .label = Tóm síða
+home-homepage-custom-url =
+    .placeholder = Límdu URL…
 # This string has a special case for '1' and [other] (default). If necessary for
 # your language, you can add {$tabCount} to your translations and use the
 # standard CLDR forms, or only use the form for [other] if both strings should
 # be identical.
 use-current-pages =
     .label =
         { $tabCount ->
             [1] Nota núverandi síðu
@@ -389,16 +404,17 @@ forms-master-pw-use =
     .accesskey = o
 forms-master-pw-change =
     .label = Breyta aðallykilorði…
     .accesskey = B
 
 ## Privacy Section - History
 
 history-header = Ferill
+history-remember-description = { -brand-short-name } mun muna feril, niðurhöl, form innslátt og leitarsögu.
 history-dontremember-description = { -brand-short-name } mun nota sömu stillingar og í huliðsstillingu, og geyma ekki vafraferil.
 history-private-browsing-permanent =
     .label = Nota alltaf einkavöfrun
     .accesskey = k
 history-remember-option =
     .label = Muna vafraferil og niðurhalsferil
     .accesskey = g
 history-remember-search-option =
@@ -413,18 +429,30 @@ history-clear-on-close-settings =
 history-clear-button =
     .label = Hreinsa feril…
     .accesskey = s
 
 ## Privacy Section - Site Data
 
 sitedata-header = Smákökur og gögn vefsvæðis
 sitedata-learn-more = Fræðast meira
+sitedata-accept-cookies-option =
+    .label = Taka á móti smákökum og gögnum frá vefsvæðum (mælt með)
+    .accesskey = a
+sitedata-block-cookies-option =
+    .label = Loka á smákökur og gögn (gæti haft áhrif virkni á vefsvæða)
+    .accesskey = ö
 sitedata-keep-until = Eiga þangað til
     .accesskey = E
+sitedata-keep-until-expire =
+    .label = þær renna út
+sitedata-keep-until-closed =
+    .label = { -brand-short-name } er lokað
+sitedata-accept-third-party-desc = Taka á móti smákökum frá þriðja aðila og gögnum
+    .accesskey = ö
 sitedata-accept-third-party-always-option =
     .label = Alltaf
 sitedata-accept-third-party-visited-option =
     .label = Frá heimsóttum síðum
 sitedata-accept-third-party-never-option =
     .label = Aldrei
 sitedata-clear =
     .label = Hreinsa gögn…

--- a/browser/chrome/browser/browser.properties
+++ b/browser/chrome/browser/browser.properties
@@ -448,20 +448,23 @@ stopButton.tooltip=Stöðva að hlaða inn síðu (%S)
 # %S is the keyboard shortcut for resetting the zoom level to 100%
 urlbar-zoom-button.tooltip=Endurstilla aðdrátt (%S)
 
 # LOCALIZATION NOTE (reader-mode-button.tooltip):
 # %S is the keyboard shortcut for entering/exiting reader view
 reader-mode-button.tooltip=Víxla lesham (%S)
 # LOCALIZATION NOTE (urlbar.placeholder):
 # %S is the name of the user's current search engine
+urlbar.placeholder=Leitaðu með %S eða sláðu inn vistfang
 # LOCALIZATION NOTE (urlbarSearchTip.onboarding):
 # %S is the name of the user's current search engine
+urlbarSearchTip.onboarding=Minni innsláttur, finna meira: Leitaðu með %S beint frá leitarslá.
 # LOCALIZATION NOTE (urlbarSearchTip.engineIsCurrentPage):
 # %S is the name of the user's current search engine
+urlbarSearchTip.engineIsCurrentPage=Byrjaðu að leita hér til að sjá tillögur frá %S og leitarferli.
 
 # LOCALIZATION NOTE(zoom-button.label): %S is the current page zoom level,
 # %% will be displayed as a single % character (% is commonly used to define
 # format specifiers, so it needs to be escaped).
 zoom-button.label = %S%%
 
 # Block autorefresh
 refreshBlocked.goButton=Leyfa