--- a/browser/components/preferences/in-content-new/privacy.xul
+++ b/browser/components/preferences/in-content-new/privacy.xul
@@ -590,30 +590,30 @@
 <groupbox id="dataCollectionGroup" data-category="panePrivacy" data-subcategory="reports" hidden="true">
   <description>
     &dataCollectionDesc.label;<label id="dataCollectionPrivacyNotice" class="learnMore text-link">&dataCollectionPrivacyNotice.label;</label>
   </description>
 
   <vbox>
     <hbox align="center">
       <checkbox id="submitHealthReportBox" label="&enableHealthReport1.label;"
-                accesskey="&enableHealthReport1.accesskey;"/>
+                accesskey="&enableHealthReport1.accesskey;" flex="1" />
       <label id="FHRLearnMore"
              class="learnMore text-link">&healthReportLearnMore.label;</label>
     </hbox>
 #ifndef MOZ_TELEMETRY_REPORTING
     <description id="TelemetryDisabledDesc" class="indent" control="telemetryGroup">&healthReportingDisabled.label;</description>
 #endif
   </vbox>
 #ifdef MOZ_CRASHREPORTER
   <hbox align="center">
     <checkbox id="automaticallySubmitCrashesBox"
               preference="browser.crashReports.unsubmittedCheck.autoSubmit"
               label="&alwaysSubmitCrashReports1.label;"
-              accesskey="&alwaysSubmitCrashReports1.accesskey;"/>
+              accesskey="&alwaysSubmitCrashReports1.accesskey;" flex="1" />
     <label id="crashReporterLearnMore"
            class="learnMore text-link">&crashReporterLearnMore.label;</label>
   </hbox>
 #endif
 </groupbox>
 #endif
 
 <hbox id="securityCategory"

--- a/browser/components/preferences/in-content-new/search.xul
+++ b/browser/components/preferences/in-content-new/search.xul
@@ -22,17 +22,17 @@
     <hbox id="searchCategory"
           class="subcategory"
           hidden="true"
           data-category="paneSearch">
       <label class="header-name" flex="1">&paneSearch.title;</label>
     </hbox>
 
     <!-- Default Search Engine -->
-    <groupbox id="defaultEngineGroup" align="start" data-category="paneSearch">
+    <groupbox id="defaultEngineGroup" data-category="paneSearch">
       <caption label="&defaultSearchEngine.label;"/>
       <label>&chooseYourDefaultSearchEngine2.label;</label>
       <menulist id="defaultEngine">
         <menupopup/>
       </menulist>
       <checkbox id="suggestionsInSearchFieldsCheckbox"
                 label="&provideSearchSuggestions.label;"
                 accesskey="&provideSearchSuggestions.accesskey;"

--- a/browser/components/preferences/in-content-new/sync.xul
+++ b/browser/components/preferences/in-content-new/sync.xul
@@ -152,31 +152,31 @@
               </vbox>
             </hbox>
           </deck>
         </groupbox>
         <groupbox id="syncOptions">
           <caption><label>&signedIn.settings.label;</label></caption>
           <description>&signedIn.settings.description;</description>
           <hbox id="fxaSyncEngines">
-            <vbox align="start" flex="1">
+            <vbox flex="1">
               <checkbox label="&engine.tabs.label2;"
                         accesskey="&engine.tabs.accesskey;"
                         preference="engine.tabs"/>
               <checkbox label="&engine.bookmarks.label;"
                         accesskey="&engine.bookmarks.accesskey;"
                         preference="engine.bookmarks"/>
               <checkbox label="&engine.logins.label;"
                         accesskey="&engine.logins.accesskey;"
                         preference="engine.passwords"/>
               <checkbox label="&engine.history.label;"
                         accesskey="&engine.history.accesskey;"
                         preference="engine.history"/>
             </vbox>
-            <vbox align="start" flex="1">
+            <vbox flex="1">
               <checkbox label="&engine.addons.label;"
                         accesskey="&engine.addons.accesskey;"
                         preference="engine.addons"/>
               <checkbox label="&engine.prefs.label;"
                         accesskey="&engine.prefs.accesskey;"
                         preference="engine.prefs"/>
               <checkbox label="&engine.addresses.label;"
                         accesskey="&engine.addresses.accesskey;"