add setting for enabling site isolation

app/extensions/brave/locales/en-US/preferences.properties

@@ -372,6 +372,8 @@ urlBarOptions=URL Bar Options
 usd=$
 useHardwareAcceleration=Use hardware acceleration when available *
 useSmoothScroll=Enable smooth scrolling *
+siteIsolation=Strict Site Isolation
+useSiteIsolation=Enhance security by loading each site in its own process (experimental) *
 verifiedExplainerText= = publisher has verified their wallet
 viewLog=View Log
 viewPaymentHistory= {{date}}

app/index.js

@@ -102,17 +102,22 @@ let loadAppStatePromise = SessionStore.loadAppState()
 
 // Some settings must be set right away on startup, those settings should be handled here.
 loadAppStatePromise.then((initialImmutableState) => {
-  const {HARDWARE_ACCELERATION_ENABLED, SMOOTH_SCROLL_ENABLED, SEND_CRASH_REPORTS} = require('../js/constants/settings')
-  CrashHerald.init(getSetting(SEND_CRASH_REPORTS, initialImmutableState.get('settings')))
+  const {HARDWARE_ACCELERATION_ENABLED, SMOOTH_SCROLL_ENABLED, SEND_CRASH_REPORTS, SITE_ISOLATION_ENABLED} = require('../js/constants/settings')
+  const initialSettings = initialImmutableState.get('settings')
+  CrashHerald.init(getSetting(SEND_CRASH_REPORTS, initialSettings))
 
   telemetry.setCheckpointAndReport('state-loaded')
-  if (getSetting(HARDWARE_ACCELERATION_ENABLED, initialImmutableState.get('settings')) === false) {
+  if (getSetting(HARDWARE_ACCELERATION_ENABLED, initialSettings) === false) {
     app.disableHardwareAcceleration()
   }
 
-  if (getSetting(SMOOTH_SCROLL_ENABLED, initialImmutableState.get('settings')) === false) {
+  if (getSetting(SMOOTH_SCROLL_ENABLED, initialSettings) === false) {
     app.commandLine.appendSwitch('disable-smooth-scrolling')
   }
+
+  if (getSetting(SITE_ISOLATION_ENABLED, initialSettings) === true) {
+    app.commandLine.appendSwitch('site-per-process')
+  }
 })
 
 const notifyCertError = (webContents, url, error, cert) => {

docs/state.md

@@ -472,6 +472,7 @@ AppStore
     'search.default-search-engine': string, // name of search engine, from js/data/searchProviders.js
     'search.offer-search-suggestions': boolean, // true if suggestions should be offered from the default search engine when available.
     'security.flash.installed': boolean,
+    'security.site-isolation-enabled': boolean,
     'shields.blocked-count-badge': boolean, // true if blocked counts on the shield button should be enabled
     'shields.compact-bravery-panel': boolean, // true if the compact Bravery panel should be enabled
     'security.passwords.active-password-manager': string, // name of active password manager

js/about/preferences.js

@@ -664,6 +664,10 @@ class SecurityTab extends ImmutableComponent {
       <SettingsList>
         <SettingCheckbox dataL10nId='doNotTrack' prefKey={settings.DO_NOT_TRACK} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
       </SettingsList>
+      <DefaultSectionTitle data-l10n-id='siteIsolation' />
+      <SettingsList>
+        <SettingCheckbox dataL10nId='useSiteIsolation' prefKey={settings.SITE_ISOLATION_ENABLED} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
+      </SettingsList>
       <SitePermissionsPage siteSettings={this.props.siteSettings} names={permissionNames} />
       <div data-l10n-id='requiresRestart' className={css(commonStyles.requiresRestart)} />
     </div>
@@ -839,6 +843,7 @@ class AboutPreferences extends React.Component {
       settings.PDFJS_ENABLED,
       settings.TORRENT_VIEWER_ENABLED,
       settings.SMOOTH_SCROLL_ENABLED,
+      settings.SITE_ISOLATION_ENABLED,
       settings.SEND_CRASH_REPORTS,
       settings.SPELLCHECK_ENABLED,
       settings.SPELLCHECK_LANGUAGES

js/constants/appConfig.js

@@ -168,6 +168,7 @@ module.exports = {
     'security.fullscreen.content': fullscreenOption.ALWAYS_ASK,
     'security.autoplay.media': autoplayOption.ALWAYS_ALLOW,
     'security.flash.installed': false,
+    'security.site-isolation-enabled': false,
     'shields.blocked-count-badge': true,
     'shields.compact-bravery-panel': false,
     // sync

js/constants/settings.js

@@ -51,6 +51,7 @@ const settings = {
   FLASH_INSTALLED: 'security.flash.installed',
   FULLSCREEN_CONTENT: 'security.fullscreen.content',
   AUTOPLAY_MEDIA: 'security.autoplay.media',
+  SITE_ISOLATION_ENABLED: 'security.site-isolation-enabled',
   // Autofill
   AUTOFILL_ENABLED: 'privacy.autofill-enabled',
   // Payments Tab