Examine source code of SpoPlus - Edit Spotify Theme & Settings

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "4.0.0",
  "default_locale": "en",
  "icons": {
    "128": "assets/icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "contents/popup.html",
    "default_icon": {
      "128": "assets/icons/icon128.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://open.spotify.com/*"
      ],
      "js": [
        "assets/js/content.js"
      ],
      "css": [
        "assets/graphs/main.css"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "assets/js/background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "assets/js/init.js",
    "assets/graphs/index.css",
    "assets/graphs/main.css",
    "assets/graphs/bigger_navbar.css",
    "assets/graphs/focus_mode.css",
    "assets/graphs/header_btns.css",
    "assets/graphs/static_aside.css",
    "assets/graphs/rect_avatars.css",
    "assets/graphs/block_images.css",
    "assets/graphs/block_videos.css",
    "assets/graphs/now_play_disable.css",
    "assets/graphs/square_shaped.css",
    "assets/graphs/hide_cards.css",
    "assets/graphs/hide_episodes.css",
    "assets/graphs/themes/dark_pink.css",
    "assets/graphs/themes/light_green.css",
    "assets/graphs/themes/purple_dark.css",
    "/assets/graphs/fonts/noto_sans.css",
    "/assets/graphs/fonts/roboto.css",
    "/assets/graphs/fonts/poppins.css",
    "/assets/graphs/fonts/playfair.css",
    "/assets/graphs/fonts/merriweather.css",
    "/assets/graphs/fonts/noto_sans.css",
    "/assets/graphs/fonts/nunito.css",
    "/assets/graphs/fonts/montserrat.css",
    "/assets/graphs/fonts/pixelify.css",
    "/assets/graphs/fonts/gabarito.css",
    "/assets/graphs/fonts/roboto_condensed.css",
    "/assets/graphs/fonts/inter.css",
    "/assets/img/cup-border.png",
    "/assets/img/frog.gif",
    "/assets/img/matrix.png",
    "/assets/img/matrix_purple.png",
    "/assets/img/logo.svg",
    "assets/graphs/themes/light_purple.css",
    "assets/graphs/themes/dark_red.css",
    "assets/graphs/themes/dark_yellow.css",
    "assets/graphs/themes/dark_blue.css",
    "assets/graphs/themes/amoled.css",
    "assets/graphs/themes/amoled_night.css",
    "assets/graphs/themes/light_pink.css",
    "assets/graphs/reduce_lowend.css",
    "assets/graphs/themes/light_pink_dd.css",
    "assets/graphs/themes/kimbie_dark.css",
    "assets/graphs/themes/red.css",
    "assets/graphs/themes/solarized_dark.css",
    "assets/graphs/themes/quiet_light.css",
    "assets/graphs/themes/dottie.css",
    "assets/graphs/heart_icons.css",
    "assets/graphs/themes/matrix.css",
    "assets/graphs/themes/matrix_purple.css",
    "assets/img/placeholders/ac-row-placeholder.png",
    "assets/img/placeholders/ylx-artist-row-placeholder.png",
    "assets/img/placeholders/tracklist-placeholder-compact.png",
    "assets/img/placeholders/ylx-compact-row-placeholder.png",
    "assets/img/placeholders/tracklist-placeholder.png",
    "assets/img/placeholders/ylx-row-placeholder.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd42a829-70e0-4781-83f3-2264420169b5}"
    }
  }
}