Disable 'Redirect to HTTPS' on platforms where we use localStorage for saving settings.

src/General/Settings.coffee

@@ -162,8 +162,12 @@ Settings =
       addCheckboxes fs, obj
       $.add section, fs
     addCheckboxes $('div[data-name="JSON Index"] > .suboption-list', section), Config.Index
+
+    # Unsupported options
     if $.engine isnt 'gecko'
-      $('div[data-name="Remember QR Size"]', section).hidden = true # XXX not supported
+      $('div[data-name="Remember QR Size"]', section).hidden = true
+    if $.perProtocolSettings
+      $('div[data-name="Redirect to HTTPS"]', section).hidden = true
 
     $.get items, (items) ->
       for key, val of items

src/main/Main.coffee

@@ -72,7 +72,7 @@ Main =
     items[key] = undefined for key of Conf
     items['previousversion'] = undefined
     ($.getSync or $.get) items, (items) ->
-      if (items['Redirect to HTTPS'] ? Conf['Redirect to HTTPS']) and location.protocol isnt 'https:'
+      if !$.perProtocolSettings and (items['Redirect to HTTPS'] ? Conf['Redirect to HTTPS']) and location.protocol isnt 'https:'
         location.replace('https:' + location.host + location.pathname + location.search + location.hash)
         return
       $.asap docSet, ->

src/platform/$.coffee

@@ -510,6 +510,9 @@ $.GM_deleteValue = (key) ->
   delete $.currentValue[key]
   GM_deleteValue key
 
+unless GM_deleteValue?
+  $.perProtocolSettings = true
+
 if GM_deleteValue?
   $.getValue   = $.GM_getValue
   $.listValues = -> GM_listValues() # error when called if missing