diff --git a/Gemfile b/Gemfile
index 34e81cef6..03b349c18 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,8 +27,10 @@ group :development do
   gem 'grape-swagger'
   #gem 'grape-swagger-ui', git: 'https://github.com/guange2015/grape-swagger-ui.git'
   #gem 'puma'
-  gem 'pry-rails'
-  gem 'pry-byebug'
+  #gem 'pry-rails'
+  #gem 'pry-byebug'
+  #gem 'pry-stack_explorer'
+  #gem 'pry-debugger'
   gem 'better_errors', path: 'lib/better_errors'
   gem 'rack-mini-profiler', path: 'lib/rack-mini-profiler'
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 9629ed437..b4f54f075 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1994,4 +1994,10 @@ module ApplicationHelper
     end
     technical_title
   end
+
+
+  def ie8?
+    request.env["HTTP_USER_AGENT"] =~ /MSIE 8.0/
+  end
+
 end
diff --git a/app/views/files/_attachement_list.html.erb b/app/views/files/_attachement_list.html.erb
index 001519a28..41025e619 100644
--- a/app/views/files/_attachement_list.html.erb
+++ b/app/views/files/_attachement_list.html.erb
@@ -22,13 +22,13 @@
 </span>
 </div>
 
-<button name="button" class="f_l ml10" onclick="_file.click()" onmouseover="this.focus()" type="button" style="width:20%; height:26%;"><%= l(:label_browse)%></button>
+<button name="button" class="f_l ml10" onclick="_file.click()" onmouseover="this.focus()" type="button" style="<%= ie8? ? 'display:none' : '' %>; width:20%; height:26%;"><%= l(:label_browse)%></button>
 <%= file_field_tag 'attachments[dummy][file]',
                    :id => '_file',
                    :class => 'file_selector',
                    :multiple => true,
                    :onchange => 'addInputFiles(this);',
-                   :style => 'display:none',
+                   :style => ie8? ? '': 'display:none',
                    :data => {
                            :max_file_size => Setting.attachment_max_size.to_i.kilobytes,
                            :max_file_size_message => l(:error_attachment_too_big, :max_size => number_to_human_size(Setting.attachment_max_size.to_i.kilobytes)),
diff --git a/app/views/files/_upload_show.html.erb b/app/views/files/_upload_show.html.erb
index 91d050d93..70465c21e 100644
--- a/app/views/files/_upload_show.html.erb
+++ b/app/views/files/_upload_show.html.erb
@@ -4,7 +4,8 @@
     <div class="upload_box">
       <%= error_messages_for 'attachment' %>
       <div id="network_issue" style="color: red; display: none;"><%= l(:label_file_upload_error_messages)%></div>
-      <%= form_tag(course_files_path(course), :multipart => true,:remote => true,:method => :post,:name=>"upload_form") do %>
+
+      <%= form_tag(course_files_path(course), :multipart => true,:remote => !ie8?,:name=>"upload_form") do %>
           <!-- <label style="margin-top:3px;"><#%= l(:label_file_upload)%></label>   -->
           <%= render :partial => 'attachement_list',:locals => {:course => course} %>
           <div class="cl"></div>