diff --git a/frontend/apps/filemanager/filemanager.lua b/frontend/apps/filemanager/filemanager.lua
index ae8410925..ec5451c0d 100644
--- a/frontend/apps/filemanager/filemanager.lua
+++ b/frontend/apps/filemanager/filemanager.lua
@@ -13,6 +13,7 @@ local UIManager = require("ui/uimanager")
 local Font = require("ui/font")
 local Screen = require("ui/screen")
 local Geom = require("ui/geometry")
+local Device = require("ui/device")
 local Event = require("ui/event")
 local DEBUG = require("dbg")
 local _ = require("gettext")
@@ -163,9 +164,21 @@ function FileManager:onClose()
     return true
 end
 
+function FileManager:getDefaultDir()
+    if Device:isKindle() then
+        return "/mnt/us/documents"
+    elseif Device:isKobo() then
+        return "/mnt/onboard"
+    elseif Device.isAndroid then
+        return "/sdcard"
+    else
+        return "."
+    end
+end
+
 function FileManager:showFiles(path)
     DEBUG("show home page")
-    path = path or G_reader_settings:readSetting("lastdir")
+    path = path or G_reader_settings:readSetting("lastdir") or self:getDefaultDir()
     G_reader_settings:saveSetting("lastdir", path)
     UIManager:show(FileManager:new{
         dimen = Screen:getSize(),
diff --git a/frontend/ui/widget/opdsbrowser.lua b/frontend/ui/widget/opdsbrowser.lua
index af90caccd..169bb1817 100644
--- a/frontend/ui/widget/opdsbrowser.lua
+++ b/frontend/ui/widget/opdsbrowser.lua
@@ -206,6 +206,13 @@ function OPDSBrowser:genItemTableFromURL(item_url, base_url)
         local function build_href(href)
             if href:match("^http") then
                 return href
+            elseif href:match("^//") then
+                local parsed = url.parse(item_url or base_url)
+                if parsed and parsed.scheme then
+                    return parsed.scheme .. ":" .. href
+                else
+                    return "http:" .. href
+                end
             elseif base_url then
                 return base_url .. "/" .. href
             elseif item_url then
@@ -302,7 +309,7 @@ end
 function OPDSBrowser:downloadFile(title, format, remote_url)
     -- download to last opened dir
     -- TODO: let the user select where to store the downloaded file?
-    local lastdir = G_reader_settings:readSetting("lastdir")
+    local lastdir = G_reader_settings:readSetting("lastdir") or "."
     local local_path = lastdir .. "/" .. title .. "." .. string.lower(format)
     DEBUG("downloading file", local_path, "from", remote_url)