Examine source code of FlamesFox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Intense Flames",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.86)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(174, 174, 174)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(192, 192, 192, 0.21)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(136, 16, 16)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(149, 149, 149)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(255, 0, 0)",
      "tab_background_separator": "rgb(255, 0, 0)",
      "tab_selected": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(136, 16, 16)",
      "toolbar_field_border": "rgb(136, 16, 16)",
      "toolbar_top_separator": "rgb(136, 16, 16)",
      "tab_loading": "rgb(136, 16, 16)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{84800bfe-ad2e-4fc2-be4a-425275426725}"
    }
  }
}