diff --git a/ext/bg/js/settings/anki-templates.js b/ext/bg/js/settings/anki-templates.js
index dd128ab8..4ceff835 100644
--- a/ext/bg/js/settings/anki-templates.js
+++ b/ext/bg/js/settings/anki-templates.js
@@ -18,19 +18,20 @@
 /* global
  * AnkiNoteBuilder
  * api
- * getOptionsContext
- * getOptionsMutable
- * settingsSaveOptions
  */
 
 class AnkiTemplatesController {
-    constructor(ankiController) {
+    constructor(settingsController, ankiController) {
+        this._settingsController = settingsController;
         this._ankiController = ankiController;
         this._cachedDefinitionValue = null;
         this._cachedDefinitionText = null;
+        this._defaultFieldTemplates = null;
     }
 
-    prepare() {
+    async prepare() {
+        this._defaultFieldTemplates = await api.getDefaultAnkiFieldTemplates();
+
         const markers = new Set([
             ...this._ankiController.getFieldMarkers('terms'),
             ...this._ankiController.getFieldMarkers('kanji')
@@ -48,21 +49,22 @@ class AnkiTemplatesController {
         $('#field-templates-reset').on('click', this._onReset.bind(this));
         $('#field-templates-reset-confirm').on('click', this._onResetConfirm.bind(this));
 
-        this.updateValue();
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        const options = await this._settingsController.getOptions();
+        this._onOptionsChanged({options});
     }
 
-    async updateValue() {
-        const optionsContext = getOptionsContext();
-        const options = await api.optionsGet(optionsContext);
+    // Private
+
+    _onOptionsChanged({options}) {
         let templates = options.anki.fieldTemplates;
-        if (typeof templates !== 'string') { templates = await api.getDefaultAnkiFieldTemplates(); }
+        if (typeof templates !== 'string') { templates = this._defaultFieldTemplates; }
         $('#field-templates').val(templates);
 
         this._onValidateCompile();
     }
 
-    // Private
-
     _onReset(e) {
         e.preventDefault();
         $('#field-template-reset-modal').modal('show');
@@ -89,10 +91,9 @@ class AnkiTemplatesController {
         }
 
         // Overwrite
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
+        const options = await this._settingsController.getOptionsMutable();
         options.anki.fieldTemplates = templates;
-        await settingsSaveOptions();
+        await this._settingsController.save();
 
         // Compile
         this._onValidateCompile();
@@ -133,10 +134,10 @@ class AnkiTemplatesController {
         const exceptions = [];
         let result = `No definition found for ${text}`;
         try {
-            const optionsContext = getOptionsContext();
+            const optionsContext = this._settingsController.getOptionsContext();
             const definition = await this._getDefinition(text, optionsContext);
             if (definition !== null) {
-                const options = await api.optionsGet(optionsContext);
+                const options = await this._settingsController.getOptions();
                 const context = {
                     document: {
                         title: document.title
diff --git a/ext/bg/js/settings/anki.js b/ext/bg/js/settings/anki.js
index d110ef39..d099239d 100644
--- a/ext/bg/js/settings/anki.js
+++ b/ext/bg/js/settings/anki.js
@@ -17,38 +17,25 @@
 
 /* global
  * api
- * getOptionsContext
- * getOptionsMutable
- * settingsSaveOptions
  * utilBackgroundIsolate
  */
 
 class AnkiController {
-    prepare() {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
+    }
+
+    async prepare() {
         $('#anki-fields-container input,#anki-fields-container select,#anki-fields-container textarea').change(this._onFieldsChanged.bind(this));
 
         for (const node of document.querySelectorAll('#anki-terms-model,#anki-kanji-model')) {
             node.addEventListener('change', this._onModelChanged.bind(this), false);
         }
 
-        this.optionsChanged();
-    }
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
 
-    async optionsChanged(options=null) {
-        if (options === null) {
-            const optionsContext = getOptionsContext();
-            options = await getOptionsMutable(optionsContext);
-        }
-
-        if (!options.anki.enable) {
-            return;
-        }
-
-        await this._deckAndModelPopulate(options);
-        await Promise.all([
-            this._fieldsPopulate('terms', options),
-            this._fieldsPopulate('kanji', options)
-        ]);
+        const options = await this._settingsController.getOptions();
+        this._onOptionsChanged({options});
     }
 
     getFieldMarkers(type) {
@@ -103,6 +90,18 @@ class AnkiController {
 
     // Private
 
+    async _onOptionsChanged({options}) {
+        if (!options.anki.enable) {
+            return;
+        }
+
+        await this._deckAndModelPopulate(options);
+        await Promise.all([
+            this._fieldsPopulate('terms', options),
+            this._fieldsPopulate('kanji', options)
+        ]);
+    }
+
     _fieldsToDict(elements) {
         const result = {};
         for (const element of elements) {
@@ -277,17 +276,15 @@ class AnkiController {
             fields[name] = '';
         }
 
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
+        const options = await this._settingsController.getOptionsMutable();
         options.anki[tabId].fields = utilBackgroundIsolate(fields);
-        await settingsSaveOptions();
+        await this._settingsController.save();
 
         await this._fieldsPopulate(tabId, options);
     }
 
     async _onFieldsChanged() {
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
+        const options = await this._settingsController.getOptionsMutable();
 
         options.anki.terms.deck = $('#anki-terms-deck').val();
         options.anki.terms.model = $('#anki-terms-model').val();
@@ -296,8 +293,6 @@ class AnkiController {
         options.anki.kanji.model = $('#anki-kanji-model').val();
         options.anki.kanji.fields = utilBackgroundIsolate(this._fieldsToDict(document.querySelectorAll('#kanji .anki-field-value')));
 
-        await settingsSaveOptions();
-
-        await this.optionsChanged(options);
+        await this._settingsController.save();
     }
 }
diff --git a/ext/bg/js/settings/audio.js b/ext/bg/js/settings/audio.js
index 5c1cb131..1a41a498 100644
--- a/ext/bg/js/settings/audio.js
+++ b/ext/bg/js/settings/audio.js
@@ -17,13 +17,11 @@
 
 /* global
  * AudioSystem
- * getOptionsContext
- * getOptionsMutable
- * settingsSaveOptions
  */
 
 class AudioController {
-    constructor() {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
         this._audioSystem = null;
         this._settingsAudioSources = null;
         this._audioSourceContainer = null;
@@ -37,27 +35,36 @@ class AudioController {
             useCache: true
         });
 
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
-
-        this._settingsAudioSources = options.audio.sources;
         this._audioSourceContainer = document.querySelector('.audio-source-list');
         this._audioSourceAddButton = document.querySelector('.audio-source-add');
         this._audioSourceContainer.textContent = '';
 
         this._audioSourceAddButton.addEventListener('click', this._onAddAudioSource.bind(this), false);
 
-        for (const audioSource of toIterable(this._settingsAudioSources)) {
-            this._createAudioSourceEntry(audioSource);
-        }
-
         this._prepareTextToSpeech();
+
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        this._onOptionsChanged();
     }
 
     // Private
 
+    async _onOptionsChanged() {
+        const options = await this._settingsController.getOptionsMutable();
+
+        for (const entry of [...this._audioSourceEntries]) {
+            this._removeAudioSourceEntry(entry);
+        }
+
+        this._settingsAudioSources = options.audio.sources;
+        for (const audioSource of toIterable(this._settingsAudioSources)) {
+            this._createAudioSourceEntry(audioSource);
+        }
+    }
+
     async _save() {
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 
     _prepareTextToSpeech() {
diff --git a/ext/bg/js/settings/backup.js b/ext/bg/js/settings/backup.js
index 4e104e6f..e93e15bf 100644
--- a/ext/bg/js/settings/backup.js
+++ b/ext/bg/js/settings/backup.js
@@ -19,13 +19,11 @@
  * api
  * optionsGetDefault
  * optionsUpdateVersion
- * utilBackend
- * utilBackgroundIsolate
- * utilIsolate
  */
 
 class SettingsBackup {
-    constructor() {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
         this._settingsExportToken = null;
         this._settingsExportRevoke = null;
         this._currentVersion = 0;
@@ -59,7 +57,7 @@ class SettingsBackup {
     }
 
     async _getSettingsExportData(date) {
-        const optionsFull = await api.optionsGetFull();
+        const optionsFull = await this._settingsController.getOptionsFull();
         const environment = await api.getEnvironmentInfo();
         const fieldTemplatesDefault = await api.getDefaultAnkiFieldTemplates();
 
@@ -143,9 +141,7 @@ class SettingsBackup {
     // Importing
 
     async _settingsImportSetOptionsFull(optionsFull) {
-        return utilIsolate(utilBackend().setFullOptions(
-            utilBackgroundIsolate(optionsFull)
-        ));
+        await this._settingsController.setOptionsFull(optionsFull);
     }
 
     _showSettingsImportError(error) {
diff --git a/ext/bg/js/settings/clipboard-popups-controller.js b/ext/bg/js/settings/clipboard-popups-controller.js
index cb9e857f..77fae305 100644
--- a/ext/bg/js/settings/clipboard-popups-controller.js
+++ b/ext/bg/js/settings/clipboard-popups-controller.js
@@ -15,29 +15,37 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-/* globals
- * getOptionsContext
- * getOptionsMutable
- * settingsSaveOptions
- */
-
 class ClipboardPopupsController {
-    prepare() {
-        document.querySelector('#enable-clipboard-popups').addEventListener('change', this._onEnableClipboardPopupsChanged.bind(this), false);
+    constructor(settingsController) {
+        this._settingsController = settingsController;
+        this._checkbox = document.querySelector('#enable-clipboard-popups');
+    }
+
+    async prepare() {
+        this._checkbox.addEventListener('change', this._onEnableClipboardPopupsChanged.bind(this), false);
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        const options = await this._settingsController.getOptions();
+        this._onOptionsChanged({options});
+    }
+
+    // Private
+
+    _onOptionsChanged({options}) {
+        this._checkbox.checked = options.general.enableClipboardPopups;
     }
 
     async _onEnableClipboardPopupsChanged(e) {
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
-
         const enableClipboardPopups = e.target.checked;
+        const options = await this._settingsController.getOptionsMutable();
+
         if (enableClipboardPopups) {
             options.general.enableClipboardPopups = await new Promise((resolve) => {
                 chrome.permissions.request(
                     {permissions: ['clipboardRead']},
                     (granted) => {
                         if (!granted) {
-                            $('#enable-clipboard-popups').prop('checked', false);
+                            this._checkbox.checked = false;
                         }
                         resolve(granted);
                     }
@@ -47,6 +55,6 @@ class ClipboardPopupsController {
             options.general.enableClipboardPopups = false;
         }
 
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 }
diff --git a/ext/bg/js/settings/dictionaries.js b/ext/bg/js/settings/dictionaries.js
index dd6dd1c1..94a71233 100644
--- a/ext/bg/js/settings/dictionaries.js
+++ b/ext/bg/js/settings/dictionaries.js
@@ -18,15 +18,12 @@
 /* global
  * PageExitPrevention
  * api
- * getOptionsContext
- * getOptionsFullMutable
- * getOptionsMutable
- * settingsSaveOptions
  * utilBackgroundIsolate
  */
 
-class SettingsDictionaryListUI {
+class SettingsDictionaryListUI extends EventDispatcher {
     constructor(container, template, extraContainer, extraTemplate) {
+        super();
         this.container = container;
         this.template = template;
         this.extraContainer = extraContainer;
@@ -309,7 +306,7 @@ class SettingsDictionaryEntryUI {
             this.isDeleting = false;
             progress.hidden = true;
 
-            this.onDatabaseUpdated();
+            this.parent.trigger('databaseUpdated');
         }
     }
 
@@ -384,7 +381,8 @@ class SettingsDictionaryExtraUI {
 }
 
 class DictionaryController {
-    constructor(storageController) {
+    constructor(settingsController, storageController) {
+        this._settingsController = settingsController;
         this._storageController = storageController;
         this._dictionaryUI = null;
         this._dictionaryErrorToStringOverrides = [
@@ -410,7 +408,8 @@ class DictionaryController {
             document.querySelector('#dict-groups-extra'),
             document.querySelector('#dict-extra-template')
         );
-        this._dictionaryUI.save = settingsSaveOptions;
+        this._dictionaryUI.save = () => this._settingsController.save();
+        this._dictionaryUI.on('databaseUpdated', this._onDatabaseUpdated.bind(this));
 
         document.querySelector('#dict-purge-button').addEventListener('click', this._onPurgeButtonClick.bind(this), false);
         document.querySelector('#dict-purge-confirm').addEventListener('click', this._onPurgeConfirmButtonClick.bind(this), false);
@@ -419,26 +418,25 @@ class DictionaryController {
         document.querySelector('#dict-main').addEventListener('change', this._onDictionaryMainChanged.bind(this), false);
         document.querySelector('#database-enable-prefix-wildcard-searches').addEventListener('change', this._onDatabaseEnablePrefixWildcardSearchesChanged.bind(this), false);
 
-        await this.optionsChanged();
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        await this._onOptionsChanged();
         await this._onDatabaseUpdated();
     }
 
-    async optionsChanged() {
-        if (this._dictionaryUI === null) { return; }
+    // Private
 
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
+    async _onOptionsChanged() {
+        const options = await this._settingsController.getOptionsMutable();
 
         this._dictionaryUI.setOptionsDictionaries(options.dictionaries);
 
-        const optionsFull = await api.optionsGetFull();
+        const optionsFull = await this._settingsController.getOptionsFull();
         document.querySelector('#database-enable-prefix-wildcard-searches').checked = optionsFull.global.database.prefixWildcardsSupported;
 
         await this._updateMainDictionarySelectValue();
     }
 
-    // Private
-
     _updateMainDictionarySelectOptions(dictionaries) {
         const select = document.querySelector('#dict-main');
         select.textContent = ''; // Empty
@@ -460,8 +458,7 @@ class DictionaryController {
     }
 
     async _updateMainDictionarySelectValue() {
-        const optionsContext = getOptionsContext();
-        const options = await api.optionsGet(optionsContext);
+        const options = await this._settingsController.getOptions();
 
         const value = options.general.mainDictionary;
 
@@ -589,10 +586,9 @@ class DictionaryController {
             missingNodeOption.parentNode.removeChild(missingNodeOption);
         }
 
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
+        const options = await this._settingsController.getOptionsMutable();
         options.general.mainDictionary = value;
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 
     _onImportButtonClick() {
@@ -622,11 +618,12 @@ class DictionaryController {
             this._dictionarySpinnerShow(true);
 
             await api.purgeDatabase();
-            for (const {options} of toIterable((await getOptionsFullMutable()).profiles)) {
+            const optionsFull = await this._settingsController.getOptionsFullMutable();
+            for (const {options} of toIterable(optionsFull.profiles)) {
                 options.dictionaries = utilBackgroundIsolate({});
                 options.general.mainDictionary = '';
             }
-            await settingsSaveOptions();
+            await this._settingsController.save();
 
             this._onDatabaseUpdated();
         } catch (err) {
@@ -665,7 +662,7 @@ class DictionaryController {
                 this._storageController.updateStats();
             };
 
-            const optionsFull = await api.optionsGetFull();
+            const optionsFull = await this._settingsController.getOptionsFull();
 
             const importDetails = {
                 prefixWildcardsSupported: optionsFull.global.database.prefixWildcardsSupported
@@ -680,7 +677,8 @@ class DictionaryController {
 
                 const archiveContent = await this._dictReadFile(files[i]);
                 const {result, errors} = await api.importDictionaryArchive(archiveContent, importDetails, updateProgress);
-                for (const {options} of toIterable((await getOptionsFullMutable()).profiles)) {
+                const optionsFull2 = await this._settingsController.getOptionsFullMutable();
+                for (const {options} of toIterable(optionsFull2.profiles)) {
                     const dictionaryOptions = SettingsDictionaryListUI.createDictionaryOptions();
                     dictionaryOptions.enabled = true;
                     options.dictionaries[result.title] = dictionaryOptions;
@@ -689,7 +687,7 @@ class DictionaryController {
                     }
                 }
 
-                await settingsSaveOptions();
+                await this._settingsController.save();
 
                 if (errors.length > 0) {
                     const errors2 = errors.map((error) => jsonToError(error));
@@ -714,10 +712,10 @@ class DictionaryController {
     }
 
     async _onDatabaseEnablePrefixWildcardSearchesChanged(e) {
-        const optionsFull = await getOptionsFullMutable();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
         const v = !!e.target.checked;
         if (optionsFull.global.database.prefixWildcardsSupported === v) { return; }
         optionsFull.global.database.prefixWildcardsSupported = !!e.target.checked;
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 }
diff --git a/ext/bg/js/settings/dom-settings-binder.js b/ext/bg/js/settings/dom-settings-binder.js
index 4b63859f..07da4f37 100644
--- a/ext/bg/js/settings/dom-settings-binder.js
+++ b/ext/bg/js/settings/dom-settings-binder.js
@@ -18,7 +18,6 @@
 /* global
  * DOMDataBinder
  * api
- * getOptionsContext
  */
 
 class DOMSettingsBinder {
diff --git a/ext/bg/js/settings/generic-setting-controller.js b/ext/bg/js/settings/generic-setting-controller.js
index 4a20bf65..d7d40c5d 100644
--- a/ext/bg/js/settings/generic-setting-controller.js
+++ b/ext/bg/js/settings/generic-setting-controller.js
@@ -16,24 +16,26 @@
  */
 
 /* globals
- * getOptionsContext
- * getOptionsMutable
- * settingsSaveOptions
  * utilBackgroundIsolate
  */
 
 class GenericSettingController {
-    prepare() {
-        $('input, select, textarea').not('.anki-model').not('.ignore-form-changes *').change(this._onFormOptionsChanged.bind(this));
+    constructor(settingsController) {
+        this._settingsController = settingsController;
     }
 
-    optionsChanged(options) {
-        this._formWrite(options);
+    async prepare() {
+        $('input, select, textarea').not('.anki-model').not('.ignore-form-changes *').change(this._onFormOptionsChanged.bind(this));
+
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        const options = await this._settingsController.getOptions();
+        this._onOptionsChanged({options});
     }
 
     // Private
 
-    async _formWrite(options) {
+    _onOptionsChanged({options}) {
         $('#enable').prop('checked', options.general.enable);
         $('#show-usage-guide').prop('checked', options.general.showGuide);
         $('#compact-tags').prop('checked', options.general.compactTags);
@@ -107,7 +109,7 @@ class GenericSettingController {
         this._formUpdateVisibility(options);
     }
 
-    async _formRead(options) {
+    _formRead(options) {
         options.general.enable = $('#enable').prop('checked');
         options.general.showGuide = $('#show-usage-guide').prop('checked');
         options.general.compactTags = $('#compact-tags').prop('checked');
@@ -180,12 +182,10 @@ class GenericSettingController {
     }
 
     async _onFormOptionsChanged() {
-        const optionsContext = getOptionsContext();
-        const options = await getOptionsMutable(optionsContext);
-
-        await this._formRead(options);
-        await settingsSaveOptions();
+        const options = await this._settingsController.getOptionsMutable();
+        this._formRead(options);
         this._formUpdateVisibility(options);
+        await this._settingsController.save();
     }
 
     _formUpdateVisibility(options) {
diff --git a/ext/bg/js/settings/main.js b/ext/bg/js/settings/main.js
index d6f55bde..cf74c0fc 100644
--- a/ext/bg/js/settings/main.js
+++ b/ext/bg/js/settings/main.js
@@ -28,71 +28,8 @@
  * SettingsController
  * StorageController
  * api
- * utilBackend
- * utilBackgroundIsolate
  */
 
-let profileIndex = 0;
-
-function getOptionsContext() {
-    return {index: getProfileIndex()};
-}
-
-function getProfileIndex() {
-    return profileIndex;
-}
-
-function setProfileIndex(value) {
-    profileIndex = value;
-}
-
-
-function getOptionsMutable(optionsContext) {
-    return utilBackend().getOptions(
-        utilBackgroundIsolate(optionsContext)
-    );
-}
-
-function getOptionsFullMutable() {
-    return utilBackend().getFullOptions();
-}
-
-
-function settingsGetSource() {
-    return new Promise((resolve) => {
-        chrome.tabs.getCurrent((tab) => resolve(`settings${tab ? tab.id : ''}`));
-    });
-}
-
-async function settingsSaveOptions() {
-    const source = await settingsGetSource();
-    await api.optionsSave(source);
-}
-
-async function onOptionsUpdated({source}) {
-    const thisSource = await settingsGetSource();
-    if (source === thisSource) { return; }
-
-    const optionsContext = getOptionsContext();
-    const options = await getOptionsMutable(optionsContext);
-
-    document.querySelector('#enable-clipboard-popups').checked = options.general.enableClipboardPopups;
-    if (ankiTemplatesController !== null) {
-        ankiTemplatesController.updateValue();
-    }
-    if (dictionaryController !== null) {
-        dictionaryController.optionsChanged();
-    }
-    if (ankiController !== null) {
-        ankiController.optionsChanged();
-    }
-
-    if (genericSettingController !== null) {
-        genericSettingController.optionsChanged(options);
-    }
-}
-
-
 function showExtensionInformation() {
     const node = document.getElementById('extension-info');
     if (node === null) { return; }
@@ -124,40 +61,34 @@ async function setupEnvironmentInfo() {
     document.documentElement.dataset.operatingSystem = platform.os;
 }
 
-let ankiController = null;
-let ankiTemplatesController = null;
-let dictionaryController = null;
-let genericSettingController = null;
 
 async function onReady() {
     api.forwardLogsToBackend();
     await yomichan.prepare();
 
-    const settingsController = new SettingsController();
-    settingsController.prepare();
-
     setupEnvironmentInfo();
     showExtensionInformation();
+    settingsPopulateModifierKeys();
+
+    const optionsFull = await api.optionsGetFull();
+    const settingsController = new SettingsController(optionsFull.profileCurrent);
+    settingsController.prepare();
 
     const storageController = new StorageController();
     storageController.prepare();
 
-    await settingsPopulateModifierKeys();
-    genericSettingController = new GenericSettingController();
+    const genericSettingController = new GenericSettingController(settingsController);
     genericSettingController.prepare();
-    new ClipboardPopupsController().prepare();
-    new PopupPreviewController().prepare();
-    new AudioController().prepare();
-    await (new ProfileController()).prepare();
-    dictionaryController = new DictionaryController(storageController);
+    new ClipboardPopupsController(settingsController).prepare();
+    new PopupPreviewController(settingsController).prepare();
+    new AudioController(settingsController).prepare();
+    new ProfileController(settingsController).prepare();
+    const dictionaryController = new DictionaryController(settingsController, storageController);
     dictionaryController.prepare();
-    ankiController = new AnkiController();
+    const ankiController = new AnkiController(settingsController);
     ankiController.prepare();
-    ankiTemplatesController = new AnkiTemplatesController(ankiController);
-    ankiTemplatesController.prepare();
-    new SettingsBackup().prepare();
-
-    yomichan.on('optionsUpdated', onOptionsUpdated);
+    new AnkiTemplatesController(settingsController, ankiController).prepare();
+    new SettingsBackup(settingsController).prepare();
 }
 
 $(document).ready(() => onReady());
diff --git a/ext/bg/js/settings/popup-preview.js b/ext/bg/js/settings/popup-preview.js
index d5519959..d4145b76 100644
--- a/ext/bg/js/settings/popup-preview.js
+++ b/ext/bg/js/settings/popup-preview.js
@@ -16,12 +16,12 @@
  */
 
 /* global
- * getOptionsContext
  * wanakana
  */
 
 class PopupPreviewController {
-    constructor() {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
         this._previewVisible = false;
         this._targetOrigin = chrome.runtime.getURL('/').replace(/\/$/, '');
         this._frame = null;
@@ -58,7 +58,7 @@ class PopupPreviewController {
         text.addEventListener('input', this._onTextChange.bind(this), false);
         customCss.addEventListener('input', this._onCustomCssChange.bind(this), false);
         customOuterCss.addEventListener('input', this._onCustomOuterCssChange.bind(this), false);
-        yomichan.on('modifyingProfileChange', this._onOptionsContextChange.bind(this));
+        this._settingsController.on('optionsContextChanged', this._onOptionsContextChange.bind(this));
 
         frame.src = '/bg/settings-popup-preview.html';
         frame.id = 'settings-popup-preview-frame';
@@ -88,7 +88,8 @@ class PopupPreviewController {
     }
 
     _onOptionsContextChange() {
-        this._invoke('updateOptionsContext', {optionsContext: getOptionsContext()});
+        const optionsContext = this._settingsController.getOptionsContext();
+        this._invoke('updateOptionsContext', {optionsContext});
     }
 
     _setText(text) {
diff --git a/ext/bg/js/settings/profiles.js b/ext/bg/js/settings/profiles.js
index e2c558e9..2449ab44 100644
--- a/ext/bg/js/settings/profiles.js
+++ b/ext/bg/js/settings/profiles.js
@@ -17,34 +17,19 @@
 
 /* global
  * ConditionsUI
- * api
  * conditionsClearCaches
- * getOptionsFullMutable
- * getProfileIndex
- * onOptionsUpdated
  * profileConditionsDescriptor
  * profileConditionsDescriptorPromise
- * setProfileIndex
- * settingsSaveOptions
  * utilBackgroundIsolate
  */
 
 class ProfileController {
-    constructor() {
+    constructor(settingsController) {
+        this._settingsController = settingsController;
         this._conditionsContainer = null;
     }
 
     async prepare() {
-        const optionsFull = await getOptionsFullMutable();
-        setProfileIndex(optionsFull.profileCurrent);
-
-        this._setupEventListeners();
-        await this._updateTarget(optionsFull);
-    }
-
-    // Private
-
-    _setupEventListeners() {
         $('#profile-target').change(this._onTargetProfileChanged.bind(this));
         $('#profile-name').change(this._onNameChanged.bind(this));
         $('#profile-add').click(this._onAdd.bind(this));
@@ -55,6 +40,17 @@ class ProfileController {
         $('#profile-move-up').click(() => this._onMove(-1));
         $('#profile-move-down').click(() => this._onMove(1));
         $('.profile-form').find('input, select, textarea').not('.profile-form-manual').change(this._onInputChanged.bind(this));
+
+        this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
+
+        this._onOptionsChanged();
+    }
+
+    // Private
+
+    async _onOptionsChanged() {
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
+        await this._formWrite(optionsFull);
     }
 
     _tryGetIntegerValue(selector, min, max) {
@@ -69,7 +65,7 @@ class ProfileController {
     }
 
     async _formRead(optionsFull) {
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const profile = optionsFull.profiles[currentProfileIndex];
 
         // Current profile
@@ -83,7 +79,7 @@ class ProfileController {
     }
 
     async _formWrite(optionsFull) {
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const profile = optionsFull.profiles[currentProfileIndex];
 
         this._populateSelect($('#profile-active'), optionsFull.profiles, optionsFull.profileCurrent, null);
@@ -108,7 +104,7 @@ class ProfileController {
             $('#profile-add-condition-group')
         );
         this._conditionsContainer.save = () => {
-            settingsSaveOptions();
+            this._settingsController.save();
             conditionsClearCaches(profileConditionsDescriptor);
         };
         this._conditionsContainer.isolate = utilBackgroundIsolate;
@@ -129,11 +125,6 @@ class ProfileController {
         select.val(`${currentValue}`);
     }
 
-    async _updateTarget(optionsFull) {
-        await this._formWrite(optionsFull);
-        await onOptionsUpdated({source: null});
-    }
-
     _createCopyName(name, profiles, maxUniqueAttempts) {
         let space, index, prefix, suffix;
         const match = /^([\w\W]*\(Copy)((\s+)(\d+))?(\)\s*)$/.exec(name);
@@ -174,39 +165,32 @@ class ProfileController {
             return;
         }
 
-        const optionsFull = await getOptionsFullMutable();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
         await this._formRead(optionsFull);
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 
     async _onTargetProfileChanged() {
-        const optionsFull = await getOptionsFullMutable();
-        const currentProfileIndex = getProfileIndex();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const index = this._tryGetIntegerValue('#profile-target', 0, optionsFull.profiles.length);
         if (index === null || currentProfileIndex === index) {
             return;
         }
 
-        setProfileIndex(index);
-
-        await this._updateTarget(optionsFull);
-
-        yomichan.trigger('modifyingProfileChange');
+        this._settingsController.profileIndex = index;
     }
 
     async _onAdd() {
-        const optionsFull = await getOptionsFullMutable();
-        const currentProfileIndex = getProfileIndex();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const profile = utilBackgroundIsolate(optionsFull.profiles[currentProfileIndex]);
         profile.name = this._createCopyName(profile.name, optionsFull.profiles, 100);
         optionsFull.profiles.push(profile);
 
-        setProfileIndex(optionsFull.profiles.length - 1);
+        this._settingsController.profileIndex = optionsFull.profiles.length - 1;
 
-        await this._updateTarget(optionsFull);
-        await settingsSaveOptions();
-
-        yomichan.trigger('modifyingProfileChange');
+        await this._settingsController.save();
     }
 
     async _onRemove(e) {
@@ -214,12 +198,12 @@ class ProfileController {
             return await this._onRemoveConfirm();
         }
 
-        const optionsFull = await api.optionsGetFull();
+        const optionsFull = await this._settingsController.getOptionsFull();
         if (optionsFull.profiles.length <= 1) {
             return;
         }
 
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const profile = optionsFull.profiles[currentProfileIndex];
 
         $('#profile-remove-modal-profile-name').text(profile.name);
@@ -229,36 +213,33 @@ class ProfileController {
     async _onRemoveConfirm() {
         $('#profile-remove-modal').modal('hide');
 
-        const optionsFull = await getOptionsFullMutable();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
         if (optionsFull.profiles.length <= 1) {
             return;
         }
 
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         optionsFull.profiles.splice(currentProfileIndex, 1);
 
         if (currentProfileIndex >= optionsFull.profiles.length) {
-            setProfileIndex(optionsFull.profiles.length - 1);
+            this._settingsController.profileIndex = optionsFull.profiles.length - 1;
         }
 
         if (optionsFull.profileCurrent >= optionsFull.profiles.length) {
             optionsFull.profileCurrent = optionsFull.profiles.length - 1;
         }
 
-        await this._updateTarget(optionsFull);
-        await settingsSaveOptions();
-
-        yomichan.trigger('modifyingProfileChange');
+        await this._settingsController.save();
     }
 
     _onNameChanged() {
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         $('#profile-active, #profile-target').find(`[value="${currentProfileIndex}"]`).text(this.value);
     }
 
     async _onMove(offset) {
-        const optionsFull = await getOptionsFullMutable();
-        const currentProfileIndex = getProfileIndex();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
+        const currentProfileIndex = this._settingsController.profileIndex;
         const index = currentProfileIndex + offset;
         if (index < 0 || index >= optionsFull.profiles.length) {
             return;
@@ -272,21 +253,18 @@ class ProfileController {
             optionsFull.profileCurrent = index;
         }
 
-        setProfileIndex(index);
+        this._settingsController.profileIndex = index;
 
-        await this._updateTarget(optionsFull);
-        await settingsSaveOptions();
-
-        yomichan.trigger('modifyingProfileChange');
+        await this._settingsController.save();
     }
 
     async _onCopy() {
-        const optionsFull = await api.optionsGetFull();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
         if (optionsFull.profiles.length <= 1) {
             return;
         }
 
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         this._populateSelect($('#profile-copy-source'), optionsFull.profiles, currentProfileIndex === 0 ? 1 : 0, [currentProfileIndex]);
         $('#profile-copy-modal').modal('show');
     }
@@ -294,9 +272,9 @@ class ProfileController {
     async _onCopyConfirm() {
         $('#profile-copy-modal').modal('hide');
 
-        const optionsFull = await getOptionsFullMutable();
+        const optionsFull = await this._settingsController.getOptionsFullMutable();
         const index = this._tryGetIntegerValue('#profile-copy-source', 0, optionsFull.profiles.length);
-        const currentProfileIndex = getProfileIndex();
+        const currentProfileIndex = this._settingsController.profileIndex;
         if (index === null || index === currentProfileIndex) {
             return;
         }
@@ -304,7 +282,6 @@ class ProfileController {
         const profileOptions = utilBackgroundIsolate(optionsFull.profiles[index].options);
         optionsFull.profiles[currentProfileIndex].options = profileOptions;
 
-        await this._updateTarget(optionsFull);
-        await settingsSaveOptions();
+        await this._settingsController.save();
     }
 }
diff --git a/ext/bg/js/settings/settings-controller.js b/ext/bg/js/settings/settings-controller.js
index 61230226..9f903f48 100644
--- a/ext/bg/js/settings/settings-controller.js
+++ b/ext/bg/js/settings/settings-controller.js
@@ -65,6 +65,11 @@ class SettingsController extends EventDispatcher {
         return utilBackend().getFullOptions();
     }
 
+    async setOptionsFull(optionsFull) {
+        utilBackend().setFullOptions(utilBackgroundIsolate(optionsFull));
+        await this.save();
+    }
+
     getOptionsContext() {
         return {index: this._profileIndex};
     }