Examine source code of Salmon Run

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Salmon Run",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-012-1e971c5fbb8dec3acbd76dd6c6819de9.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 184, 185)",
      "toolbar_text": "rgb(111, 90, 120)",
      "frame": "rgb(255, 225, 222)",
      "tab_background_text": "rgb(111, 90, 120)",
      "toolbar_field": "rgb(255, 253, 250)",
      "toolbar_field_text": "rgb(47, 184, 228)",
      "tab_line": "rgb(47, 184, 228)",
      "popup": "rgb(255, 253, 250)",
      "popup_text": "rgb(36, 38, 38)",
      "ntp_background": "rgb(36, 38, 38)",
      "ntp_text": "rgb(255, 225, 222)",
      "popup_border": "rgb(47, 184, 228)",
      "popup_highlight_text": "rgb(47, 184, 228)",
      "popup_highlight": "rgb(255, 225, 222)",
      "tab_selected": "rgb(251, 198, 199)",
      "toolbar_bottom_separator": "rgb(255, 225, 222)",
      "toolbar_field_highlight_text": "rgb(47, 184, 228)",
      "toolbar_field_highlight": "rgb(255, 225, 222)",
      "toolbar_top_separator": "rgb(255, 225, 222)",
      "toolbar_vertical_separator": "rgb(47, 184, 228)",
      "tab_loading": "rgb(47, 184, 228)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d99af5d3-9d7b-4ff5-bdd5-6e24f900f0f2}"
    }
  }
}