FF: register hotkeys on startup; reset if empty

js/prefs.js

@@ -299,6 +299,21 @@ var prefs = new function Prefs() {
     });
   });
 
+  // register hotkeys
+  if (FIREFOX && (browser.commands || {}).update) {
+    const hotkeyPrefs = Object.keys(values).filter(k => k.startsWith('hotkey.'));
+    this.subscribe(hotkeyPrefs, (name, value) => {
+      try {
+        name = name.split('.')[1];
+        if (value.trim()) {
+          browser.commands.update({name, shortcut: value}).catch(ignoreChromeError);
+        } else {
+          browser.commands.reset(name).catch(ignoreChromeError);
+        }
+      } catch (e) {}
+    });
+  }
+
   return;
 
   function doBroadcast() {

options/options.js

@@ -159,6 +159,7 @@ function customizeHotkeys() {
             $create('td',
               $create('input', {
                 id: 'hotkey.' + cmd,
+                type: 'search',
                 //placeholder: t('helpKeyMapHotkey'),
               })),
           ]))),
@@ -181,16 +182,15 @@ function customizeHotkeys() {
   });
 
   function onInput() {
-    const hotkey = this.value.trim();
-    if (!hotkey) {
+    const name = this.id.split('.')[1];
+    const shortcut = this.value.trim();
+    if (!shortcut) {
+      browser.commands.reset(name).catch(ignoreChromeError);
       this.setCustomValidity('');
       return;
     }
     try {
-      browser.commands.update({
-        name: this.id.split('.')[1],
-        shortcut: hotkey,
-      }).then(
+      browser.commands.update({name, shortcut}).then(
         () => this.setCustomValidity(''),
         err => this.setCustomValidity(err)
       );