Examine source code of Black Bomb

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Black Bomb",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(15, 15, 15)",
      "toolbar_text": "rgb(181, 181, 181)",
      "frame": "rgb(15, 15, 15)",
      "tab_background_text": "rgb(161, 151, 153)",
      "toolbar_field": "rgb(174, 174, 174)",
      "toolbar_field_text": "rgb(33, 33, 33)",
      "tab_line": "rgb(102, 102, 102)",
      "popup": "rgb(38, 38, 38)",
      "popup_text": "rgb(238, 238, 238)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{91448ef6-4adf-46fd-bded-6735fd912c1b}"
    }
  }
}