Examine source code of Tabs to Bookmark Groups

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "tabs-to-bookmark-groups@qw.thucfb.com",
      "strict_min_version": "68.0"
    }
  },
  "name": "__MSG_extensionName__",
  "version": "0.2b1",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "icons/icon.svg"
  },
  "permissions": [
    "storage",
    "tabs",
    "bookmarks",
    "sessions",
    "browserSettings",
    "menus",
    "menus.overrideContext",
    "unlimitedStorage",
    "contextualIdentities",
    "idle",
    "cookies"
  ],
  "browser_action": {
    "default_icon": "icons/icon-color.svg#dark",
    "theme_icons": [
      {
        "light": "icons/icon-color.svg#light",
        "dark": "icons/icon-color.svg#dark",
        "size": 48
      }
    ],
    "default_title": "__MSG_extensionName__",
    "default_popup": "panel/panel.html?browserAction=1",
    "browser_style": false
  },
  "sidebar_action": {
    "default_icon": "icons/icon.svg",
    "default_title": "__MSG_extensionName__",
    "default_panel": "panel/panel.html",
    "open_at_install": false,
    "browser_style": false
  },
  "background": {
    "page": "background/background.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  },
  "default_locale": "en"
}