app/helpers/accounts_helper.rb

@@ -11,7 +11,7 @@ module AccountsHelper
 
   def acct(account)
     if account.local?
-      "@#{account.acct}@#{Rails.configuration.x.local_domain}"
+      "@#{account.acct}@#{site_hostname}"
     else
       "@#{account.pretty_acct}"
     end

app/models/concerns/remotable.rb

@@ -36,8 +36,8 @@ module Remotable
 
             basename = SecureRandom.hex(8)
 
-            send("#{attachment_name}=", StringIO.new(response.body_with_limit(limit)))
             send("#{attachment_name}_file_name=", basename + extname)
+            send("#{attachment_name}=", StringIO.new(response.body_with_limit(limit)))
 
             self[attribute_name] = url if has_attribute?(attribute_name)
           end

app/views/accounts/_og.html.haml

@@ -10,4 +10,4 @@
 = opengraph 'og:image:width', '120'
 = opengraph 'og:image:height', '120'
 = opengraph 'twitter:card', 'summary'
-= opengraph 'profile:username', account.local_username_and_domain
+= opengraph 'profile:username', acct(account)[1..-1]

app/views/accounts/show.html.haml

 - content_for :page_title do
-  = "#{display_name(@account)} (@#{@account.local_username_and_domain})"
+  = "#{display_name(@account)} (#{acct(@account)})"
 
 - content_for :header_tags do
   - if @account.user&.setting_noindex

app/views/statuses/show.html.haml

@@ -10,7 +10,7 @@
 
   = opengraph 'og:site_name', site_title
   = opengraph 'og:type', 'article'
-  = opengraph 'og:title', "#{display_name(@account)} (@#{@account.local_username_and_domain})"
+  = opengraph 'og:title', "#{display_name(@account)} (#{acct(@account)})"
   = opengraph 'og:url', short_account_status_url(@account, @status)
 
   = render 'og_description', activity: @status