title: firebug display network error
body: <p>I searched in google but couldn't get a solution. </p>
  
  <p>When I working on my project now firebug show 4 errors something like this. </p>
  
  <pre><code>"NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/profile.jpg"
  
  profile.jpg
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/premium-%20tag.png"
  
  premium- tag.png
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/profile.jpg"
  
  profile.jpg
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/premium-%20tag.png"
  
  premium- tag.png
  
  "CSS Usage: initializing extensions"
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/profile.jpg"
  
  profile.jpg
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/premium-%20tag.png"
  
  premium- tag.png
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/profile.jpg"
  
  profile.jpg
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/premium-%20tag.png"
  
  premium- tag.png
  
  "CSS Usage: initializing extensions"
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/premium-%20tag.png"
  
  premium- tag.png
  
  "NetworkError: 404 Not Found - http://localhost/LankaInstitute/images/profile.jpg"
  </code></pre>
  
  <p>Can anybody tell me what does this mean and how can I fix this?</p>
  
  <p>Thank you. </p>