Examine source code of yassd

{
  "description": "__MSG_extText__",
  "manifest_version": 2,
  "name": "yassd",
  "default_locale": "en",
  "version": "0.0.2",
  "permissions": [
    "storage",
    "menus",
    "tabs",
    "clipboardWrite",
    "downloads",
    "webRequest",
    "*://*/*.m3u8",
    "*://*/*.m3u8?*",
    "*://*/*.mpd",
    "*://*/*.mpd?*",
    "*://*/*.f4m",
    "*://*/*.f4m?*",
    "*://*/*.ism",
    "*://*/*.ism/*",
    "*://*/*.vtt",
    "*://*/*.vtt/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "data/icon-16.png",
    "48": "data/icon-48.png",
    "96": "data/icon-96.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_action": {
    "browser_style": true,
    "theme_icons": [
      {
        "dark": "data/icon-96.png",
        "light": "data/icon-96.png",
        "size": 96
      },
      {
        "dark": "data/icon-48.png",
        "light": "data/icon-48.png",
        "size": 48
      },
      {
        "dark": "data/icon-16.png",
        "light": "data/icon-16.png",
        "size": 16
      }
    ]
  }
}