diff --git a/firefox/extension/lib/settings.js b/firefox/extension/lib/settings.js
index e8db5cd4..ef1807cf 100644
--- a/firefox/extension/lib/settings.js
+++ b/firefox/extension/lib/settings.js
@@ -2,39 +2,53 @@ window.config = {}
 window.settings = {
 
     controls: { // displays top-to-bottom in toolbar menu
-        infinityMode: { type: 'toggle',
-            label: chrome.i18n.getMessage('menuLabel_infinityMode') },
-        autoStart: { type: 'toggle',
-            label: chrome.i18n.getMessage('menuLabel_autoStart'),
-            helptip: chrome.i18n.getMessage('helptip_autoStart') },
-        toggleHidden: { type: 'toggle',
-            label: chrome.i18n.getMessage('menuLabel_toggleVis'),
-            helptip: chrome.i18n.getMessage('helptip_toggleVis') },
-        autoScrollDisabled: { type: 'toggle',
-            label: chrome.i18n.getMessage('menuLabel_autoScroll'),
-            helptip: chrome.i18n.getMessage('helptip_autoScroll') },
-        replyLanguage: { type: 'prompt', symbol: '🌐',
-            label: chrome.i18n.getMessage('menuLabel_replyLang'),
-            helptip: chrome.i18n.getMessage('prompt_updateReplyLang') },
-        replyTopic: { type: 'prompt', symbol: '🧠',
-            label: chrome.i18n.getMessage('menuLabel_replyTopic'),
-            helptip: chrome.i18n.getMessage('prompt_updateReplyTopic') },
-        replyInterval: { type: 'prompt', symbol: '⌚',
-            label: chrome.i18n.getMessage('menuLabel_replyInt'),
-            helptip: chrome.i18n.getMessage('prompt_updateReplyInt') }
+        get infinityMode() { return { type: 'toggle',
+            label: window.settings.getMsg('menuLabel_infinityMode') }},
+        get autoStart() { return { type: 'toggle',
+            label: window.settings.getMsg('menuLabel_autoStart'),
+            helptip: window.settings.getMsg('helptip_autoStart') }},
+        get toggleHidden() { return { type: 'toggle',
+            label: window.settings.getMsg('menuLabel_toggleVis'),
+            helptip: window.settings.getMsg('helptip_toggleVis') }},
+        get autoScrollDisabled() { return { type: 'toggle',
+            label: window.settings.getMsg('menuLabel_autoScroll'),
+            helptip: window.settings.getMsg('helptip_autoScroll') }},
+        get replyLanguage() { return { type: 'prompt', symbol: '🌐',
+            label: window.settings.getMsg('menuLabel_replyLang'),
+            helptip: window.settings.getMsg('prompt_updateReplyLang'),
+            status: window.config.replyLanguage }},
+        get replyTopic() { return { type: 'prompt', symbol: '🧠',
+            label: window.settings.getMsg('menuLabel_replyTopic'),
+            helptip: window.settings.getMsg('prompt_updateReplyTopic'),
+            status: window.config.replyTopic }},
+        get replyInterval() { return { type: 'prompt', symbol: '⌚',
+            label: window.settings.getMsg('menuLabel_replyInt'),
+            helptip: window.settings.getMsg('prompt_updateReplyInt'),
+            status: window.config.replyInterval }}
+    },
+
+    getMsg(key) {
+        return typeof chrome != 'undefined' && chrome.runtime ? chrome.i18n.getMessage(key)
+            : this.appProps.msgs[key] // assigned from app.msgs in userscript
     },
 
     load() {
         const keys = ( // original array if array, else new array from multiple args
             Array.isArray(arguments[0]) ? arguments[0] : Array.from(arguments))
-        return Promise.all(keys.map(key => // resolve promise when all keys load
-            new Promise(resolve => // resolve promise when single key value loads
-                chrome.storage.sync.get(key, result => { // load from browser extension storage
-                    window.config[key] = result[key] || false ; resolve()
-    }))))},
+        if (typeof chrome != 'undefined' && chrome.runtime) // asynchronously load from browser extension storage
+            return Promise.all(keys.map(key => // resolve promise when all keys load
+                new Promise(resolve => // resolve promise when single key value loads
+                    chrome.storage.sync.get(key, result => {
+                        window.config[key] = result[key] || false ; resolve()
+        })))) ; else // synchronously load from userscript manager storage
+            keys.forEach(key => window.config[key] = GM_getValue(this.appProps.configKeyPrefix + '_' + key, false))
+    },
 
     save(key, val) {
-        chrome.storage.sync.set({ [key]: val }) // save to browser extension storage
+        if (typeof chrome != 'undefined' && chrome.runtime) // save to browser extension storage
+            chrome.storage.sync.set({ [key]: val })
+        else // save to userscript manager storage
+            GM_setValue(this.appProps.configKeyPrefix + '_' + key, val)
         window.config[key] = val // save to memory
     }
 };
diff --git a/firefox/extension/popup/controller.js b/firefox/extension/popup/controller.js
index faf512ea..f61df4a1 100644
--- a/firefox/extension/popup/controller.js
+++ b/firefox/extension/popup/controller.js
@@ -77,13 +77,7 @@
     // Create CHILD menu entries on chatgpt.com
     if (site == 'chatgpt') {
         await settings.load(Object.keys(settings.controls))
-
-        // Init prompt setting status labels
         const re_all = new RegExp(`^(${chrome.i18n.getMessage('menuLabel_all')}|all|any|every)$`, 'i')
-        settings.controls.replyLanguage.status = config.replyLanguage
-        settings.controls.replyTopic.status = re_all.test(config.replyTopic) ?
-            chrome.i18n.getMessage('menuLabel_all') : toTitleCase(config.replyTopic)
-        settings.controls.replyInterval.status = `${config.replyInterval}s`
 
         // Create/insert child section
         const togglesDiv = dom.create.elem('div', { class: 'menu' })
@@ -150,7 +144,7 @@
                     const replyTopic = await (await prompt(chrome.i18n.getMessage('prompt_updateReplyTopic')
                         + ' (' + chrome.i18n.getMessage('prompt_orEnter') + ' \'ALL\'):', config.replyTopic)).input
                     if (replyTopic != null) { // user didn't cancel
-                        const str_replyTopic = replyTopic.toString()
+                        const str_replyTopic = toTitleCase(replyTopic.toString())
                         settings.save('replyTopic',
                             !replyTopic || re_all.test(str_replyTopic) ? chrome.i18n.getMessage('menuLabel_all')
                                                                        : str_replyTopic)