Examine source code of Matte Animated Stars v2 by Slash Mark

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Matte Animated Stars v2 by Slash Mark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/background.gif"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(22, 35, 40, 0.65)",
      "toolbar_text": "rgb(215, 215, 215)",
      "frame": "rgb(26, 26, 26)",
      "tab_background_text": "rgb(179, 180, 181)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(214, 214, 214)",
      "tab_line": "rgba(8, 98, 168, 0.43)",
      "popup": "rgb(27, 40, 45)",
      "popup_text": "rgb(179, 180, 181)",
      "button_background_active": "rgb(1, 112, 208)",
      "button_background_hover": "rgb(104, 182, 249)",
      "frame_inactive": "rgba(0, 27, 48, 0.9)",
      "icons_attention": "rgb(0, 200, 255)",
      "icons": "rgb(0, 143, 204)",
      "ntp_background": "rgb(26, 26, 26)",
      "ntp_text": "rgb(215, 215, 215)",
      "popup_border": "rgb(8, 98, 168)",
      "popup_highlight_text": "rgb(215, 215, 215)",
      "popup_highlight": "rgba(104, 182, 249, 0.29)",
      "sidebar_border": "rgb(0, 179, 255)",
      "sidebar_highlight_text": "rgba(1, 112, 208, 0.51)",
      "sidebar_highlight": "rgb(206, 210, 210)",
      "sidebar_text": "rgb(215, 215, 215)",
      "tab_loading": "rgba(8, 98, 168, 0.43)"
    }
  },
  "description": "Matte Animated Stars v2 is a calm dark theme featuring subtle animated stars over a smooth matte background, designed for comfortable night-time browsing with minimal glare and elegant motion.",
  "author": "Slash Mark",
  "homepage_url": "https://slashmark.in",
  "browser_specific_settings": {
    "gecko": {
      "id": "{dfc2cebf-e224-45c8-a2e1-db2c42c27a16}"
    }
  }
}