Examine source code of B Slow

{
  "name": "B Slow",
  "description": "Delay some resources, to make some sites less laggy. Use only when you know what you are doing. You are responsible for any behavior and usage consequences.",
  "manifest_version": 2,
  "version": "0.7",
  "homepage_url": "https://garywill.github.io",
  "developer": {
    "name": "Garywill"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "*://*.bilibili.com/*",
    "*://*.hdslb.com/*",
    "*://*.biliapi.net/*",
    "*://*.bilivideo.com/*",
    "*://*.bilivideo.cn/*",
    "contextMenus",
    "tabs",
    "storage"
  ],
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "icon_gray.png",
    "default_title": "B Slow"
  },
  "commands": {
    "_execute_browser_action": {
      "description": "Click toolbar button"
    },
    "toggle_t": {
      "description": "Toggle for one tab"
    },
    "toggle_h": {
      "description": "Toggle for one tab and new tabs opened by it"
    },
    "toggle_window": {
      "description": "Toggle for one window"
    },
    "toggle_global": {
      "description": "Toggle globally enable/disable"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a8604615-dd63-4ff1-b0d5-e37df5a61caf}"
    }
  }
}