diff --git a/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js b/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js
index bdd1a37e6f22..161b63792f41 100644
--- a/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js
+++ b/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_windowtitle.js
@@ -26,7 +26,7 @@ add_task(function test() {
     about_pb_title = "Open a private window?";
     pb_page_with_title = test_title + " - (Private Browsing)";
     pb_page_without_title = app_name + " - (Private Browsing)";
-    pb_about_pb_title = "You're browsing privately - (Private Browsing)";
+    pb_about_pb_title = "You’re browsing privately - (Private Browsing)";
   }
   else {
     page_with_title = test_title + " - " + app_name;
@@ -34,7 +34,7 @@ add_task(function test() {
     about_pb_title = "Open a private window?" + " - " + app_name;
     pb_page_with_title = test_title + " - " + app_name + " (Private Browsing)";
     pb_page_without_title = app_name + " (Private Browsing)";
-    pb_about_pb_title = "You're browsing privately - " + app_name + " (Private Browsing)";
+    pb_about_pb_title = "You’re browsing privately - " + app_name + " (Private Browsing)";
   }
 
   function* testTabTitle(aWindow, url, insidePB, expected_title) {
diff --git a/browser/locales/en-US/chrome/browser/aboutCertError.dtd b/browser/locales/en-US/chrome/browser/aboutCertError.dtd
index a23e45fd64d5..cdebc88eba90 100644
--- a/browser/locales/en-US/chrome/browser/aboutCertError.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutCertError.dtd
@@ -26,12 +26,12 @@ Strict Transport Security (HSTS) to specify that &brandShortName; only connect
 to it securely. As a result, it is not possible to add an exception for this
 certificate.">
 
-<!ENTITY certerror.expert.content "If you understand what's going on, you
-can tell &brandShortName; to start trusting this site's identification.
+<!ENTITY certerror.expert.content "If you understand what’s going on, you
+can tell &brandShortName; to start trusting this site’s identification.
 <b>Even if you trust the site, this error could mean that someone is
 tampering with your connection.</b>">
-<!ENTITY certerror.expert.contentPara2 "Don't add an exception unless
-you know there's a good reason why this site doesn't use trusted identification.">
+<!ENTITY certerror.expert.contentPara2 "Don’t add an exception unless
+you know there’s a good reason why this site doesn’t use trusted identification.">
 <!ENTITY certerror.addException.label "Add Exception…">
 <!ENTITY certerror.copyToClipboard.label "Copy text to clipboard">
 
diff --git a/browser/locales/en-US/chrome/browser/aboutDialog.dtd b/browser/locales/en-US/chrome/browser/aboutDialog.dtd
index 7da16d9088e0..368e0d5f8473 100644
--- a/browser/locales/en-US/chrome/browser/aboutDialog.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutDialog.dtd
@@ -46,7 +46,7 @@
 <!ENTITY helpus.getInvolvedLink     "get involved!">
 <!ENTITY helpus.end                 "">
 
-<!ENTITY releaseNotes.link          "What's new">
+<!ENTITY releaseNotes.link          "What’s new">
 
 <!-- LOCALIZATION NOTE (bottomLinks.license): This is a link title that links to about:license. -->
 <!ENTITY bottomLinks.license        "Licensing Information">
diff --git a/browser/locales/en-US/chrome/browser/aboutHome.dtd b/browser/locales/en-US/chrome/browser/aboutHome.dtd
index ed979dee2034..7e3b57a79978 100644
--- a/browser/locales/en-US/chrome/browser/aboutHome.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutHome.dtd
@@ -18,7 +18,7 @@
 <!-- LOCALIZATION NOTE (abouthome.defaultSnippet2.v1):
      text in <a/> will be linked to the featured add-ons on addons.mozilla.org
 -->
-<!ENTITY abouthome.defaultSnippet2.v1 "It's easy to customize your Firefox exactly the way you want it. <a>Choose from thousands of add-ons</a>.">
+<!ENTITY abouthome.defaultSnippet2.v1 "It’s easy to customize your Firefox exactly the way you want it. <a>Choose from thousands of add-ons</a>.">
 <!-- LOCALIZATION NOTE (abouthome.rightsSnippet): text in <a/> will be linked to about:rights -->
 <!ENTITY abouthome.rightsSnippet "&brandFullName; is free and open source software from the non-profit Mozilla Foundation. <a>Know your rights…</a>">
 
diff --git a/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.dtd b/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.dtd
index 8dbecc7f3daf..cd1e9942067c 100644
--- a/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.dtd
@@ -15,7 +15,7 @@
      30em to prevent the sections from wrapping on smaller window sizes.
      -->
 <!ENTITY aboutPrivateBrowsing.width1           "30em">
-<!ENTITY aboutPrivateBrowsing.title            "You're browsing privately">
+<!ENTITY aboutPrivateBrowsing.title            "You’re browsing privately">
 
 <!ENTITY aboutPrivateBrowsing.info.notsaved    "Not Saved">
 <!ENTITY aboutPrivateBrowsing.info.history     "History">
diff --git a/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.properties b/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.properties
index b5dc075c55e9..23b9fddeecd0 100644
--- a/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.properties
+++ b/browser/locales/en-US/chrome/browser/aboutPrivateBrowsing.properties
@@ -2,5 +2,5 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-title=You're browsing privately
+title=You’re browsing privately
 title.normal=Open a private window?
diff --git a/browser/locales/en-US/chrome/browser/aboutRobots.dtd b/browser/locales/en-US/chrome/browser/aboutRobots.dtd
index 139603d8d3ba..23447add187b 100644
--- a/browser/locales/en-US/chrome/browser/aboutRobots.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutRobots.dtd
@@ -15,10 +15,10 @@
 <!ENTITY robots.errorShortDescText "We have come to visit you in peace and with goodwill!">
 <!-- Various books by Isaac Asimov. http://en.wikipedia.org/wiki/Three_Laws_of_Robotics -->
 <!ENTITY robots.errorLongDesc1 "Robots may not injure a human being or, through inaction, allow a human being to come to harm.">
-<!-- Movie: Blade Runner. Batty: "I've seen things you people wouldn't believe..." -->
-<!ENTITY robots.errorLongDesc2 "Robots have seen things you people wouldn't believe.">
-<!-- Book: Hitchhiker's Guide To The Galaxy. What the Sirius Cybernetics Corporation calls robots. -->
-<!ENTITY robots.errorLongDesc3 "Robots are Your Plastic Pal Who's Fun To Be With.">
+<!-- Movie: Blade Runner. Batty: "I've seen things you people wouldn’t believe..." -->
+<!ENTITY robots.errorLongDesc2 "Robots have seen things you people wouldn’t believe.">
+<!-- Book: Hitchhiker’s Guide To The Galaxy. What the Sirius Cybernetics Corporation calls robots. -->
+<!ENTITY robots.errorLongDesc3 "Robots are Your Plastic Pal Who’s Fun To Be With.">
 <!-- TV: Futurama. Bender's first line is "Bite my shiny metal ass." -->
 <!ENTITY robots.errorLongDesc4 "Robots have shiny metal posteriors which should not be bitten.">
 <!-- TV: Battlestar Galactica (2004 series). From the opening text. -->
diff --git a/browser/locales/en-US/chrome/browser/aboutSessionRestore.dtd b/browser/locales/en-US/chrome/browser/aboutSessionRestore.dtd
index e32967e930a7..af8c123c7061 100644
--- a/browser/locales/en-US/chrome/browser/aboutSessionRestore.dtd
+++ b/browser/locales/en-US/chrome/browser/aboutSessionRestore.dtd
@@ -26,7 +26,7 @@
 <!-- LOCALIZATION NOTE: The following 'welcomeback2' strings are for about:welcomeback,
      not for about:sessionstore -->
 
-<!ENTITY welcomeback2.restoreButton  "Let's go!">
+<!ENTITY welcomeback2.restoreButton  "Let’s go!">
 <!ENTITY welcomeback2.restoreButton.access "L">
 
 <!ENTITY welcomeback2.tabtitle      "Success!">
@@ -44,7 +44,7 @@ before and after the the "learn more" link (welcomeback2.link.pageInfo2).
 Localizers can use one of them, or both, to better adapt this sentence to
 their language.
 -->
-<!ENTITY welcomeback2.beforelink.pageInfo2  "Your add-ons and customizations have been removed and your browser settings have been restored to their defaults. If this didn't fix your issue, ">
+<!ENTITY welcomeback2.beforelink.pageInfo2  "Your add-ons and customizations have been removed and your browser settings have been restored to their defaults. If this didn’t fix your issue, ">
 <!ENTITY welcomeback2.afterlink.pageInfo2   "">
 
 <!ENTITY welcomeback2.link.pageInfo2        "learn more about what you can do.">
@@ -52,9 +52,9 @@ their language.
 <!-- LOCALIZATION NOTE: The following 'tabgroupsmigration' strings are for
      the tab groups (panorama) migration page, not about:sessionrestore -->
 <!ENTITY tabgroupsmigration.tabtitle            "Migrate your other Tab Groups">
-<!ENTITY tabgroupsmigration.pagetitle2          "We've removed Tab Groups, but saved your tabs">
+<!ENTITY tabgroupsmigration.pagetitle2          "We’ve removed Tab Groups, but saved your tabs">
 <!ENTITY tabgroupsmigration.learnaboutaddons    "Learn about Tab Groups replacement add-ons.">
-<!ENTITY tabgroupsmigration.description2        "&brandShortName; has bookmarked all your groups so you haven't lost anything.">
+<!ENTITY tabgroupsmigration.description2        "&brandShortName; has bookmarked all your groups so you haven’t lost anything.">
 <!ENTITY tabgroupsmigration.bookmarkbutton      "Show Bookmarked Tab Groups">
 <!ENTITY tabgroupsmigration.restoredescription  "You can also choose to restore some or all background groups into windows now:">
 
diff --git a/browser/locales/en-US/chrome/browser/accounts.properties b/browser/locales/en-US/chrome/browser/accounts.properties
index e3d42f0ea508..c62018f096b3 100644
--- a/browser/locales/en-US/chrome/browser/accounts.properties
+++ b/browser/locales/en-US/chrome/browser/accounts.properties
@@ -4,7 +4,7 @@
 
 # autoDisconnectDescription is shown in an info bar when we detect an old
 # Sync is being used.
-autoDisconnectDescription = We've rebuilt Sync to make it easier for everyone.
+autoDisconnectDescription = We’ve rebuilt Sync to make it easier for everyone.
 
 # autoDisconnectSignIn.label and .accessKey are for buttons when we auto-disconnect
 autoDisconnectSignIn.label = Sign in to Sync
diff --git a/browser/locales/en-US/chrome/browser/browser.dtd b/browser/locales/en-US/chrome/browser/browser.dtd
index d67b8dac9b32..fd09f8d16f9d 100644
--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -765,7 +765,7 @@ you can use these alternative items. Otherwise, their values should be empty.  -
 <!ENTITY identity.description.insecure "Your connection to this site is not private. Information you submit could be viewed by others (like passwords, messages, credit cards, etc.).">
 <!ENTITY identity.description.insecureLoginForms "The login information you enter on this page is not secure and could be compromised.">
 <!ENTITY identity.description.weakCipher "Your connection to this website uses weak encryption and is not private.">
-<!ENTITY identity.description.weakCipher2 "Other people can view your information or modify the website's behavior.">
+<!ENTITY identity.description.weakCipher2 "Other people can view your information or modify the website’s behavior.">
 <!ENTITY identity.description.activeBlocked "&brandShortName; has blocked parts of this page that are not secure.">
 <!ENTITY identity.description.passiveLoaded "Your connection is not private and information you share with the site could be viewed by others.">
 <!ENTITY identity.description.passiveLoaded2 "This website contains content that is not secure (such as images).">
diff --git a/browser/locales/en-US/chrome/browser/browser.properties b/browser/locales/en-US/chrome/browser/browser.properties
index fbd526aa51be..cf43b7a857b0 100644
--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -133,8 +133,8 @@ popupWarningButtonUnix=Preferences
 popupWarningButtonUnix.accesskey=P
 popupAllow=Allow pop-ups for %S
 popupBlock=Block pop-ups for %S
-popupWarningDontShowFromMessage=Don't show this message when pop-ups are blocked
-popupWarningDontShowFromLocationbar=Don't show info bar when pop-ups are blocked
+popupWarningDontShowFromMessage=Don’t show this message when pop-ups are blocked
+popupWarningDontShowFromLocationbar=Don’t show info bar when pop-ups are blocked
 popupShowPopupPrefix=Show '%S'
 
 # Bad Content Blocker Doorhanger Notification
@@ -178,7 +178,7 @@ pluginActivate.updateLabel=Update now…
 # %1$S is the plugin name, %2$S is the domain, and %3$S is brandShortName.
 pluginActivateVulnerable.message=%3$S has prevented the unsafe plugin "%1$S" from running on %2$S.
 pluginActivateVulnerable.label=Vulnerable plugin!
-pluginActivate.riskLabel=What's the risk?
+pluginActivate.riskLabel=What’s the risk?
 # LOCALIZATION NOTE (pluginActivateBlocked.message): %1$S is the plugin name, %2$S is brandShortName
 pluginActivateBlocked.message=%2$S has blocked "%1$S" for your protection.
 pluginActivateBlocked.label=Blocked for your protection
@@ -366,7 +366,7 @@ puAlertText=Click here for details
 # Geolocation UI
 
 # LOCALIZATION NOTE (geolocation.shareLocation geolocation.alwaysShareLocation geolocation.neverShareLocation):
-#If you're having trouble with the word Share, please use Allow and Block in your language.
+# If you're having trouble with the word Share, please use Allow and Block in your language.
 geolocation.shareLocation=Share Location
 geolocation.shareLocation.accesskey=a
 geolocation.alwaysShareLocation=Always Share Location
@@ -406,10 +406,10 @@ pointerLock.autoLock.title3=This site will hide the pointer.
 safebrowsing.getMeOutOfHereButton.label=Get me out of here!
 safebrowsing.getMeOutOfHereButton.accessKey=G
 safebrowsing.deceptiveSite=Deceptive Site!
-safebrowsing.notADeceptiveSiteButton.label=This isn't a deceptive site…
+safebrowsing.notADeceptiveSiteButton.label=This isn’t a deceptive site…
 safebrowsing.notADeceptiveSiteButton.accessKey=D
 safebrowsing.reportedAttackSite=Reported Attack Site!
-safebrowsing.notAnAttackButton.label=This isn't an attack site…
+safebrowsing.notAnAttackButton.label=This isn’t an attack site…
 safebrowsing.notAnAttackButton.accessKey=A
 safebrowsing.reportedUnwantedSite=Reported Unwanted Software Site!
 
@@ -510,10 +510,10 @@ getUserMedia.shareCamera.message = Would you like to share your camera with %S?
 getUserMedia.shareMicrophone.message = Would you like to share your microphone with %S?
 getUserMedia.shareScreen.message = Would you like to share your screen with %S?
 getUserMedia.shareCameraAndMicrophone.message = Would you like to share your camera and microphone with %S?
-getUserMedia.shareCameraAndAudioCapture.message = Would you like to share your camera and this tab's audio with %S?
+getUserMedia.shareCameraAndAudioCapture.message = Would you like to share your camera and this tab’s audio with %S?
 getUserMedia.shareScreenAndMicrophone.message = Would you like to share your microphone and screen with %S?
-getUserMedia.shareScreenAndAudioCapture.message = Would you like to share this tab's audio and your screen with %S?
-getUserMedia.shareAudioCapture.message = Would you like to share this tab's audio with %S?
+getUserMedia.shareScreenAndAudioCapture.message = Would you like to share this tab’s audio and your screen with %S?
+getUserMedia.shareAudioCapture.message = Would you like to share this tab’s audio with %S?
 getUserMedia.selectWindow.label=Window to share:
 getUserMedia.selectWindow.accesskey=W
 getUserMedia.selectScreen.label=Screen to share:
@@ -548,7 +548,7 @@ getUserMedia.shareWindow.label = Share Selected Window
 getUserMedia.shareSelectedItems.label = Share Selected Items
 getUserMedia.always.label = Always Share
 getUserMedia.always.accesskey = A
-getUserMedia.denyRequest.label = Don't Share
+getUserMedia.denyRequest.label = Don’t Share
 getUserMedia.denyRequest.accesskey = D
 getUserMedia.never.label = Never Share
 getUserMedia.never.accesskey = N
@@ -559,7 +559,7 @@ getUserMedia.sharingApplication.message = You are currently sharing an applicati
 getUserMedia.sharingScreen.message = You are currently sharing your screen with this page.
 getUserMedia.sharingWindow.message = You are currently sharing a window with this page.
 getUserMedia.sharingBrowser.message = You are currently sharing a tab with this page.
-getUserMedia.sharingAudioCapture.message = You are currently sharing a tab's audio with this page.
+getUserMedia.sharingAudioCapture.message = You are currently sharing a tab’s audio with this page.
 getUserMedia.continueSharing.label = Continue Sharing
 getUserMedia.continueSharing.accesskey = C
 getUserMedia.stopSharing.label = Stop Sharing
@@ -662,7 +662,7 @@ emeNotifications.unknownDRMSoftware = Unknown
 slowStartup.message = %S seems slow… to… start.
 slowStartup.helpButton.label = Learn How to Speed It Up
 slowStartup.helpButton.accesskey = L
-slowStartup.disableNotificationButton.label = Don't Tell Me Again
+slowStartup.disableNotificationButton.label = Don’t Tell Me Again
 slowStartup.disableNotificationButton.accesskey = A
 
 # LOCALIZATION NOTE  - %S is brandShortName
@@ -756,8 +756,8 @@ unmuteTab.label = Unmute Tab
 unmuteTab.accesskey = M
 
 # LOCALIZATION NOTE (weakCryptoOverriding.message): %S is brandShortName
-weakCryptoOverriding.message = %S recommends that you don't enter your password, credit card and other personal information on this website.
-revokeOverride.label = Don't Trust This Website
+weakCryptoOverriding.message = %S recommends that you don’t enter your password, credit card and other personal information on this website.
+revokeOverride.label = Don’t Trust This Website
 revokeOverride.accesskey = D
 
 # LOCALIZATION NOTE (certErrorDetails*.label): These are text strings that
diff --git a/browser/locales/en-US/chrome/browser/downloads/downloads.properties b/browser/locales/en-US/chrome/browser/downloads/downloads.properties
index f49279ade8cb..f7e92f1dba8c 100644
--- a/browser/locales/en-US/chrome/browser/downloads/downloads.properties
+++ b/browser/locales/en-US/chrome/browser/downloads/downloads.properties
@@ -96,7 +96,7 @@ statusSeparatorBeforeNumber=%1$S \u2014  %2$S
 
 fileExecutableSecurityWarning="%S" is an executable file. Executable files may contain viruses or other malicious code that could harm your computer. Use caution when opening this file. Are you sure you want to launch "%S"?
 fileExecutableSecurityWarningTitle=Open Executable File?
-fileExecutableSecurityWarningDontAsk=Don't ask me this again
+fileExecutableSecurityWarningDontAsk=Don’t ask me this again
 
 # LOCALIZATION NOTE (otherDownloads2):
 # This is displayed in an item at the bottom of the Downloads Panel when
diff --git a/browser/locales/en-US/chrome/browser/feeds/subscribe.properties b/browser/locales/en-US/chrome/browser/feeds/subscribe.properties
index 474ce7262d6c..e856bedf7053 100644
--- a/browser/locales/en-US/chrome/browser/feeds/subscribe.properties
+++ b/browser/locales/en-US/chrome/browser/feeds/subscribe.properties
@@ -25,7 +25,7 @@ kilobyte=KB
 megabyte=MB
 gigabyte=GB
 
-# LOCALIZATION NOTE: The next three strings explains to the user what they're 
+# LOCALIZATION NOTE: The next three strings explains to the user what they're
 # doing.
 #   e.g. alwaysUseForVideoPodcasts : "Always use Miro to subscribe to video podcasts."
 #   %S = application to use (Miro, iTunes, ...)
diff --git a/browser/locales/en-US/chrome/browser/migration/migration.dtd b/browser/locales/en-US/chrome/browser/migration/migration.dtd
index ce9665a22f33..df6938c51450 100644
--- a/browser/locales/en-US/chrome/browser/migration/migration.dtd
+++ b/browser/locales/en-US/chrome/browser/migration/migration.dtd
@@ -13,7 +13,7 @@
 <!ENTITY importFromIE.accesskey         "M">
 <!ENTITY importFromEdge.label           "Microsoft Edge">
 <!ENTITY importFromEdge.accesskey       "E">
-<!ENTITY importFromNothing.label        "Don't import anything">
+<!ENTITY importFromNothing.label        "Don’t import anything">
 <!ENTITY importFromNothing.accesskey    "D">
 <!ENTITY importFromSafari.label         "Safari">
 <!ENTITY importFromSafari.accesskey     "S">
diff --git a/browser/locales/en-US/chrome/browser/newTab.properties b/browser/locales/en-US/chrome/browser/newTab.properties
index 3f167a7c658b..7b3fe248eef2 100644
--- a/browser/locales/en-US/chrome/browser/newTab.properties
+++ b/browser/locales/en-US/chrome/browser/newTab.properties
@@ -34,7 +34,7 @@ newtab.suggested.explain=This site is suggested to you by Mozilla. You can remov
 # the gear icon used to customize the new tab window. %2$S will be replaced by
 # an active link using string newtab.learn.link as text.
 newtab.enhanced.explain=A Mozilla partner has visually enhanced this tile, replacing the screenshot. You can turn off enhanced tiles by clicking the %1$S button for your preferences. %2$S
-newtab.intro1.paragraph1=Now when you open New Tab, you'll also see sites we think might be interesting to you. Some may be suggested by Mozilla or sponsored by one of our partners.
+newtab.intro1.paragraph1=Now when you open New Tab, you’ll also see sites we think might be interesting to you. Some may be suggested by Mozilla or sponsored by one of our partners.
 # LOCALIZATION NOTE(newtab.intro1.paragraph2): %1$S will be replaced inline by
 # an active link using string newtab.privacy.link as text. %2$S will be replaced
 # inline by the gear icon used to customize the new tab window.
diff --git a/browser/locales/en-US/chrome/browser/places/places.properties b/browser/locales/en-US/chrome/browser/places/places.properties
index 41e7a78f5ee2..95dba3464499 100644
--- a/browser/locales/en-US/chrome/browser/places/places.properties
+++ b/browser/locales/en-US/chrome/browser/places/places.properties
@@ -88,6 +88,6 @@ searchengineResultLabel=Search
 # LOCALIZATION NOTE (lockPrompt.text)
 # %S will be replaced with the application name.
 lockPrompt.title=Browser Startup Error
-lockPrompt.text=The bookmarks and history system will not be functional because one of %S's files is in use by another application. Some security software can cause this problem.
+lockPrompt.text=The bookmarks and history system will not be functional because one of %S’s files is in use by another application. Some security software can cause this problem.
 lockPromptInfoButton.label=Learn More
 lockPromptInfoButton.accessKey=L
diff --git a/browser/locales/en-US/chrome/browser/quitDialog.properties b/browser/locales/en-US/chrome/browser/quitDialog.properties
index 00f3be5fdd08..35cdaa0d739e 100644
--- a/browser/locales/en-US/chrome/browser/quitDialog.properties
+++ b/browser/locales/en-US/chrome/browser/quitDialog.properties
@@ -10,4 +10,4 @@ saveTitle=&Save and Quit
 neverAsk2=&Do not ask next time
 message=Do you want %S to save your tabs and windows for the next time it starts?
 messageNoWindows=Do you want %S to save your tabs for the next time it starts?
-messagePrivate=You're in private browsing mode. Quitting %S now will discard all your open tabs and windows.
+messagePrivate=You’re in private browsing mode. Quitting %S now will discard all your open tabs and windows.
diff --git a/browser/locales/en-US/chrome/browser/safebrowsing/phishing-afterload-warning-message.dtd b/browser/locales/en-US/chrome/browser/safebrowsing/phishing-afterload-warning-message.dtd
index a63540588406..6a827851eb59 100644
--- a/browser/locales/en-US/chrome/browser/safebrowsing/phishing-afterload-warning-message.dtd
+++ b/browser/locales/en-US/chrome/browser/safebrowsing/phishing-afterload-warning-message.dtd
@@ -5,7 +5,7 @@
 <!ENTITY safeb.palm.accept.label "Get me out of here!">
 <!ENTITY safeb.palm.decline.label "Ignore this warning">
 <!-- Localization note (safeb.palm.notdeceptive.label) - Label of the Help menu item. -->
-<!ENTITY safeb.palm.notdeceptive.label "This isn't a deceptive site…">
+<!ENTITY safeb.palm.notdeceptive.label "This isn’t a deceptive site…">
 <!ENTITY safeb.palm.reportPage.label "Why was this page blocked?">
 <!ENTITY safeb.palm.whyForbidden.label "Why was this page blocked?">
 
diff --git a/browser/locales/en-US/chrome/browser/shellservice.properties b/browser/locales/en-US/chrome/browser/shellservice.properties
index f18ff9eb4fce..e3dc14b7e30f 100644
--- a/browser/locales/en-US/chrome/browser/shellservice.properties
+++ b/browser/locales/en-US/chrome/browser/shellservice.properties
@@ -14,7 +14,7 @@ setDefaultBrowserOptions.label     = Options
 setDefaultBrowserOptions.accesskey = O
 setDefaultBrowserNotNow.label      = Not now
 setDefaultBrowserNotNow.accesskey  = N
-setDefaultBrowserNever.label       = Don't ask me again
+setDefaultBrowserNever.label       = Don’t ask me again
 setDefaultBrowserNever.accesskey   = D
 
 # LOCALIZATION NOTE (setDefaultBrowserTitle, setDefaultBrowserMessage, setDefaultBrowserDontAsk, setDefaultBrowserAlertConfirm.label, setDefaultBrowserAlertNotNow.label):
diff --git a/browser/locales/en-US/chrome/browser/syncKey.dtd b/browser/locales/en-US/chrome/browser/syncKey.dtd
index f37f2c92e159..2ff0018420ae 100644
--- a/browser/locales/en-US/chrome/browser/syncKey.dtd
+++ b/browser/locales/en-US/chrome/browser/syncKey.dtd
@@ -5,12 +5,12 @@
 <!ENTITY syncKey.page.title               "Your &syncBrand.fullName.label; Key">
 <!ENTITY syncKey.page.description2        "This key is used to decode the data in your &syncBrand.fullName.label; account. You will need to enter the key each time you configure &syncBrand.fullName.label; on a new device.">
 <!ENTITY syncKey.keepItSecret.heading     "Keep it secret">
-<!ENTITY syncKey.keepItSecret.description "Your &syncBrand.fullName.label; account is encrypted to protect your privacy. Without this key, it would take years for anyone to decode your personal information. You are the only person who holds this key. This means you're the only one who can access your &syncBrand.fullName.label; data.">
+<!ENTITY syncKey.keepItSecret.description "Your &syncBrand.fullName.label; account is encrypted to protect your privacy. Without this key, it would take years for anyone to decode your personal information. You are the only person who holds this key. This means you’re the only one who can access your &syncBrand.fullName.label; data.">
 <!ENTITY syncKey.keepItSafe.heading       "Keep it safe">
 <!ENTITY syncKey.keepItSafe1.description  "Do not lose this key.">
-<!ENTITY syncKey.keepItSafe2.description  " We don't keep a copy of your key (that wouldn't be keeping it secret!) so ">
-<!ENTITY syncKey.keepItSafe3.description  "we can't help you recover it">
-<!ENTITY syncKey.keepItSafe4a.description " if it's lost. You'll need to use this key any time you connect a new device to &syncBrand.fullName.label;.">
+<!ENTITY syncKey.keepItSafe2.description  " We don’t keep a copy of your key (that wouldn’t be keeping it secret!) so ">
+<!ENTITY syncKey.keepItSafe3.description  "we can’t help you recover it">
+<!ENTITY syncKey.keepItSafe4a.description " if it’s lost. You’ll need to use this key any time you connect a new device to &syncBrand.fullName.label;.">
 <!ENTITY syncKey.findOutMore1.label       "Find out more about &syncBrand.fullName.label; and your privacy at ">
 <!ENTITY syncKey.findOutMore2.label       ".">
 <!ENTITY syncKey.footer1.label            "&syncBrand.fullName.label; Terms of Service are available at ">
diff --git a/browser/locales/en-US/chrome/browser/syncSetup.dtd b/browser/locales/en-US/chrome/browser/syncSetup.dtd
index 379554942962..1fd46942d9d8 100644
--- a/browser/locales/en-US/chrome/browser/syncSetup.dtd
+++ b/browser/locales/en-US/chrome/browser/syncSetup.dtd
@@ -6,13 +6,13 @@
 
 <!-- First page of the wizard -->
 
-<!ENTITY setup.pickSetupType.description2 "Welcome! If you've never used &syncBrand.fullName.label; before, you will need to create a new account.">
+<!ENTITY setup.pickSetupType.description2 "Welcome! If you’ve never used &syncBrand.fullName.label; before, you will need to create a new account.">
 <!ENTITY button.createNewAccount.label "Create a New Account">
 <!ENTITY button.haveAccount.label      "I Have an Account">
 
 <!ENTITY setup.choicePage.title.label     "Have you used &syncBrand.fullName.label; before?">
-<!ENTITY setup.choicePage.new.label       "I've never used &syncBrand.shortName.label; before">
-<!ENTITY setup.choicePage.existing2.label "I'm already using &syncBrand.shortName.label; on another device">
+<!ENTITY setup.choicePage.new.label       "I’ve never used &syncBrand.shortName.label; before">
+<!ENTITY setup.choicePage.existing2.label "I’m already using &syncBrand.shortName.label; on another device">
 
 <!-- New Account AND Existing Account -->
 <!ENTITY server.label               "Server">
@@ -60,7 +60,7 @@
 <!-- Existing Account Page 1: Pair a Device (incl. Pair a Device dialog strings) -->
 <!ENTITY pairDevice.title.label             "Pair a Device">
 <!ENTITY addDevice.showMeHow.label          "Show me how.">
-<!ENTITY addDevice.dontHaveDevice.label     "I don't have the device with me">
+<!ENTITY addDevice.dontHaveDevice.label     "I don’t have the device with me">
 <!ENTITY pairDevice.setup.description.label  "To activate, select &#x0022;Pair a Device&#x0022; on your other device.">
 <!ENTITY addDevice.setup.enterCode.label    "Then, enter this code:">
 <!ENTITY pairDevice.dialog.description.label "To activate your new device, select &#x0022;Set Up Sync&#x0022; on the device.">
@@ -96,14 +96,14 @@
 <!ENTITY engine.addons.label        "Add-ons">
 <!ENTITY engine.addons.accesskey    "A">
 
-<!ENTITY choice2a.merge.main.label       "Merge this device's data with my &syncBrand.shortName.label; data">
+<!ENTITY choice2a.merge.main.label       "Merge this device’s data with my &syncBrand.shortName.label; data">
 <!ENTITY choice2.merge.recommended.label "Recommended:">
 <!ENTITY choice2a.client.main.label      "Replace all data on this device with my &syncBrand.shortName.label; data">
-<!ENTITY choice2a.server.main.label      "Replace all other devices with this device's data">
+<!ENTITY choice2a.server.main.label      "Replace all other devices with this device’s data">
 
 <!-- Confirm Merge Options -->
 <!ENTITY setup.optionsConfirmPage.title "Confirm">
-<!ENTITY confirm.merge2.label    "&syncBrand.fullName.label; will now merge all this device's browser data into your Sync account.">
+<!ENTITY confirm.merge2.label    "&syncBrand.fullName.label; will now merge all this device’s browser data into your Sync account.">
 <!ENTITY confirm.client3.label         "Warning: The following &brandShortName; data on this device  will be deleted:">
 <!ENTITY confirm.client2.moreinfo.label "&brandShortName; will then copy your &syncBrand.fullName.label; data to this device.">
 <!ENTITY confirm.server2.label         "Warning: The following devices will be overwritten with your local data:">
diff --git a/browser/locales/en-US/chrome/browser/syncSetup.properties b/browser/locales/en-US/chrome/browser/syncSetup.properties
index 74a187f78988..35e2169b14a0 100644
--- a/browser/locales/en-US/chrome/browser/syncSetup.properties
+++ b/browser/locales/en-US/chrome/browser/syncSetup.properties
@@ -42,7 +42,7 @@ save.recoverykey.defaultfilename = Firefox Recovery Key.html
 
 newAccount.action.label = Firefox Sync is now set up to automatically sync all of your browser data.
 newAccount.change.label = You can choose exactly what to sync by selecting Sync Options below.
-resetClient.change2.label = Firefox Sync will now merge all this device's browser data into your Sync account.
+resetClient.change2.label = Firefox Sync will now merge all this device’s browser data into your Sync account.
 wipeClient.change2.label = Firefox Sync will now replace all of the browser data on this device with the data in your Sync account.
 wipeRemote.change2.label = Firefox Sync will now replace all of the browser data in your Sync account with the data on this device.
 existingAccount.change.label = You can change this preference by selecting Sync Options below.
diff --git a/browser/locales/en-US/chrome/overrides/appstrings.properties b/browser/locales/en-US/chrome/overrides/appstrings.properties
index 9382aa12c939..c4cfb510fc2c 100644
--- a/browser/locales/en-US/chrome/overrides/appstrings.properties
+++ b/browser/locales/en-US/chrome/overrides/appstrings.properties
@@ -3,23 +3,23 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 malformedURI=The URL is not valid and cannot be loaded.
-fileNotFound=Firefox can't find the file at %S.
-dnsNotFound=Firefox can't find the server at %S.
-unknownProtocolFound=Firefox doesn't know how to open this address, because one of the following protocols (%S) isn't associated with any program or is not allowed in this context.
-connectionFailure=Firefox can't establish a connection to the server at %S.
+fileNotFound=Firefox can’t find the file at %S.
+dnsNotFound=Firefox can’t find the server at %S.
+unknownProtocolFound=Firefox doesn’t know how to open this address, because one of the following protocols (%S) isn’t associated with any program or is not allowed in this context.
+connectionFailure=Firefox can’t establish a connection to the server at %S.
 netInterrupt=The connection to %S was interrupted while the page was loading.
 netTimeout=The server at %S is taking too long to respond.
 redirectLoop=Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
-## LOCALIZATION NOTE (confirmRepostPrompt): In this item, don't translate "%S"
+## LOCALIZATION NOTE (confirmRepostPrompt): In this item, don’t translate "%S"
 confirmRepostPrompt=To display this page, %S must send information that will repeat any action (such as a search or order confirmation) that was performed earlier.
 resendButton.label=Resend
-unknownSocketType=Firefox doesn't know how to communicate with the server.
+unknownSocketType=Firefox doesn’t know how to communicate with the server.
 netReset=The connection to the server was reset while the page was loading.
 notCached=This document is no longer available.
-netOffline=Firefox is currently in offline mode and can't browse the Web.
+netOffline=Firefox is currently in offline mode and can’t browse the Web.
 isprinting=The document cannot change while Printing or in Print Preview.
 deniedPortAccess=This address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection.
-proxyResolveFailure=Firefox is configured to use a proxy server that can't be found.
+proxyResolveFailure=Firefox is configured to use a proxy server that can’t be found.
 proxyConnectFailure=Firefox is configured to use a proxy server that is refusing connections.
 contentEncodingError=The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
 unsafeContentType=The page you are trying to view cannot be shown because it is contained in a file type that may not be safe to open. Please contact the website owners to inform them of this problem.
diff --git a/browser/locales/en-US/crashreporter/crashreporter-override.ini b/browser/locales/en-US/crashreporter/crashreporter-override.ini
index 3345d7681077..f14b1c4f0dab 100644
--- a/browser/locales/en-US/crashreporter/crashreporter-override.ini
+++ b/browser/locales/en-US/crashreporter/crashreporter-override.ini
@@ -5,5 +5,5 @@
 # This file is in the UTF-8 encoding
 [Strings]
 # LOCALIZATION NOTE (CrashReporterProductErrorText2): The %s is replaced with a string containing detailed information.
-CrashReporterProductErrorText2=Firefox had a problem and crashed. We'll try to restore your tabs and windows when it restarts.\n\nUnfortunately the crash reporter is unable to submit a crash report.\n\nDetails: %s
-CrashReporterDescriptionText2=Firefox had a problem and crashed. We'll try to restore your tabs and windows when it restarts.\n\nTo help us diagnose and fix the problem, you can send us a crash report.
+CrashReporterProductErrorText2=Firefox had a problem and crashed. We’ll try to restore your tabs and windows when it restarts.\n\nUnfortunately the crash reporter is unable to submit a crash report.\n\nDetails: %s
+CrashReporterDescriptionText2=Firefox had a problem and crashed. We’ll try to restore your tabs and windows when it restarts.\n\nTo help us diagnose and fix the problem, you can send us a crash report.