These types of issues are often hard to troubleshoot and can usually be resolved simply by disabling hardware acceleration. To do this, follow these steps:

  1. Open a file (any file)
  2. Use browser preview (View > Browser Preview) to preview the file "in a browser" but set it to open in a Komodo tab
  3. Replace the file address with about:config to get into the settings
  4. Look for layers.acceleration.disabled and set it to true
  5. Restart Komodo