Examine source code of testing

{
  "name": "testing",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "y.PNG"
    },
    "colors": {
      "frame": "rgba(112, 47, 7, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(64, 18, 18, 0.56)",
      "bookmark_text": "rgba(66, 42, 13, 1)",
      "toolbar_field": "rgba(181, 53, 53, 0)",
      "toolbar_field_text": "rgba(87, 56, 38, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{beb8415d-d384-48b5-a0e4-5daafab03814}"
    }
  }
}