Examine source code of OrangeGreen2

{
  "name": "OrangeGreen2",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "rgba(198, 227, 175, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(250, 250, 250, 1)",
      "toolbar_field_text": "rgba(120, 6, 6, 1)",
      "tab_line": "rgba(90, 176, 37, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eedf5e92-d4c8-4d5f-a270-725b63915d24}"
    }
  }
}